Laptop power supply repair

[Daniel Prince]

I use my Lenovo IBM THINKPAD T60 1953 in bed. When I am not using
it, I put it into a garage I made on the side of my bed. I bought
the laptop used in April 2008. In late July 2008 the cable of the
power supply started to fail. It would connect and disconnect
itself when it was moved slightly.

I bought a replacement power supply. It failed a few months later.
This time, I cut it open and repaired it using solder. I had to
repair it again a few months after that.

Yesterday, It failed for a third time. This time I repaired both
the replacement power supply and the original supply so that I would
have a spare. I tested both supplies. They both worked.

I used one of the supplies (the original one) for a few hours. This
morning, my laptop made the ding dong sound it makes when the AC
power is disconnected and the AC indicator light did not light.

I thought that the repair I had made had failed. I connected the
other power supply but it did not light the AC light either. I
tested both power supplies with a volt meter (not connected to the
laptop). They both tested good. (These supplies are rated 20
volts. One was 20.1 volts and the other was 20.3.)

I have tried both supplies several times and neither of them make
the AC indicator light up and the says that it is on battery power
with the battery charge going down. Obviously the laptop is not
getting AC power.

Does anyone have any idea what could be wrong and how I can fix it?
Thank you in advance for all replies.
--
Whenever I hear or think of the song "Great green gobs of greasy
grimey gopher guts" I imagine my cat saying; "That sounds REALLY,
REALLY good. I'll have some of that!"

 

[JerryM]

On Jun 25, 3:32 pm, Daniel Prince <neutri...@ca.rr.com> wrote:

Does anyone have any idea what could be wrong and how I can fix it?
Thank you in advance for all replies.

I have seen, on various newsgroups (Dell for example), of people
complaining about the power supply socket on the MOTHERBOARD of the
laptop. I imagine it gets a lot of mechanical stress, could be some
problems with the solder connections there.

Jerry

 

[Wild_Bill]

I think Jerry's conclusion is likely to be the problem you're experiencing
now. Opening laptop cases can be a bit complicated at times, but I think you
may find the instructions at the Lenovo website.

Locating a new power connector for the motherboard would probably be a wise
move if you intend to repair the problem yourself.
I've seen various new laptop motherboard power connectors on eBay, but it's
likely that numerous online parts vendors would also be selling them.

Straight power cord connectors typically put more stress on the power
connection than right-angled connectors do, but manufacturers insist on
using straight connectors in most cases, as they may be a couple of cents
cheaper (SWAG).

A right-angle connector, in combination with a temporary anchor point on the
instrument's case near the port, would be a much more durable connection.

--
Cheers,
WB
..............


"Daniel Prince" <neutrino1@ca.rr.com> wrote in message
news:ikp745t2kla7a5r5b9ahinh3gqao9flcjl@4ax.com...

I use my Lenovo IBM THINKPAD T60 1953 in bed. When I am not using
it, I put it into a garage I made on the side of my bed. I bought
the laptop used in April 2008. In late July 2008 the cable of the
power supply started to fail. It would connect and disconnect
itself when it was moved slightly.

I bought a replacement power supply. It failed a few months later.
This time, I cut it open and repaired it using solder. I had to
repair it again a few months after that.

Yesterday, It failed for a third time. This time I repaired both
the replacement power supply and the original supply so that I would
have a spare. I tested both supplies. They both worked.

I used one of the supplies (the original one) for a few hours. This
morning, my laptop made the ding dong sound it makes when the AC
power is disconnected and the AC indicator light did not light.

I thought that the repair I had made had failed. I connected the
other power supply but it did not light the AC light either. I
tested both power supplies with a volt meter (not connected to the
laptop). They both tested good. (These supplies are rated 20
volts. One was 20.1 volts and the other was 20.3.)

I have tried both supplies several times and neither of them make
the AC indicator light up and the says that it is on battery power
with the battery charge going down. Obviously the laptop is not
getting AC power.

Does anyone have any idea what could be wrong and how I can fix it?
Thank you in advance for all replies.
--
Whenever I hear or think of the song "Great green gobs of greasy
grimey gopher guts" I imagine my cat saying; "That sounds REALLY,
REALLY good. I'll have some of that!"

 

[JB]

Just make sure you take ESD precautions or you will likely wind up with a
paper weight.

"Wild_Bill" <wb_wildbill@XSPAMyahoo.com> wrote in message
news:hEW0m.283738$Tp1.1104@en-nntp-01.dc1.easynews.com...

I think Jerry's conclusion is likely to be the problem you're experiencing
now. Opening laptop cases can be a bit complicated at times, but I think
you
may find the instructions at the Lenovo website.

Locating a new power connector for the motherboard would probably be a
wise
move if you intend to repair the problem yourself.
I've seen various new laptop motherboard power connectors on eBay, but
it's
likely that numerous online parts vendors would also be selling them.

Straight power cord connectors typically put more stress on the power
connection than right-angled connectors do, but manufacturers insist on
using straight connectors in most cases, as they may be a couple of cents
cheaper (SWAG).

A right-angle connector, in combination with a temporary anchor point on
the
instrument's case near the port, would be a much more durable connection.

--
Cheers,
WB
.............


"Daniel Prince" <neutrino1@ca.rr.com> wrote in message
news:ikp745t2kla7a5r5b9ahinh3gqao9flcjl@4ax.com...
I use my Lenovo IBM THINKPAD T60 1953 in bed. When I am not using
it, I put it into a garage I made on the side of my bed. I bought
the laptop used in April 2008. In late July 2008 the cable of the
power supply started to fail. It would connect and disconnect
itself when it was moved slightly.

I bought a replacement power supply. It failed a few months later.
This time, I cut it open and repaired it using solder. I had to
repair it again a few months after that.

Yesterday, It failed for a third time. This time I repaired both
the replacement power supply and the original supply so that I would
have a spare. I tested both supplies. They both worked.

I used one of the supplies (the original one) for a few hours. This
morning, my laptop made the ding dong sound it makes when the AC
power is disconnected and the AC indicator light did not light.

I thought that the repair I had made had failed. I connected the
other power supply but it did not light the AC light either. I
tested both power supplies with a volt meter (not connected to the
laptop). They both tested good. (These supplies are rated 20
volts. One was 20.1 volts and the other was 20.3.)

I have tried both supplies several times and neither of them make
the AC indicator light up and the says that it is on battery power
with the battery charge going down. Obviously the laptop is not
getting AC power.

Does anyone have any idea what could be wrong and how I can fix it?
Thank you in advance for all replies.
--
Whenever I hear or think of the song "Great green gobs of greasy
grimey gopher guts" I imagine my cat saying; "That sounds REALLY,
REALLY good. I'll have some of that!"

 

[larry moe 'n curly]

Daniel Prince wrote:

I use my Lenovo IBM THINKPAD T60 1953 in bed. When I am not using
it, I put it into a garage I made on the side of my bed. I bought
the laptop used in April 2008. In late July 2008 the cable of the
power supply started to fail. It would connect and disconnect
itself when it was moved slightly.

I bought a replacement power supply. It failed a few months later.
This time, I cut it open and repaired it using solder. I had to
repair it again a few months after that.

Yesterday, It failed for a third time. This time I repaired both
the replacement power supply and the original supply so that I would
have a spare. I tested both supplies. They both worked.

I used one of the supplies (the original one) for a few hours. This
morning, my laptop made the ding dong sound it makes when the AC
power is disconnected and the AC indicator light did not light.

I thought that the repair I had made had failed. I connected the
other power supply but it did not light the AC light either. I
tested both power supplies with a volt meter (not connected to the
laptop). They both tested good. (These supplies are rated 20
volts. One was 20.1 volts and the other was 20.3.)

You may want to check www.LaptopRepair101.com or www.NotebookReview.com
(has forums).

I find it hard to believe that two power packs would fail, especially
when they each measure normally, but have you tried measuring each
while a 10-100 ohm load is applied to the DC output? Because
something like a bad crimp connection could cause the voltage to be
normal with no load but much lower with a load. Here a 10 ohm
resistor has to be rated for at least 40 watts, a 100 ohm resistor for
at least 4 watts.

If the power connector on the motherboard has a cracked solder joint,
you'll probably need a soldering iron rated for at least 40W,
preferrably at least 50, and even better would be a temperature
controlled 60-70W iron.

I don't like using laptops on my laptop because it blocks the air flow
underneath, and moving around the hard disk so much can't be good for
it. So we put our laptops on tables that can swing out of the way and
have frames permanently attached under the bed frame. I tried
building this out of wood, but it was too bouncy, so I had the frame
welded from aluminum.

 

[abo mahab]

Some Basic Islamic Beliefs
Please forgive me for any disturbance, but I have an important subject
to address to you regarding FAITH, and I Don’t intend to overload your
email with unnecessary messages…

Some Basic Islamic Beliefs
1) Belief in God:
Muslims believe in one, unique, incomparable God, Who has no son nor
partner, and that none has the right to be worshipped but Him alone.
He is the true God, and every other deity is false. He has the most
magnificent names and sublime perfect attributes. No one shares His
divinity, nor His attributes. In the Quran, God describes Himself:


Say, “He is God, the One. God, to Whom the creatures turn for their
needs. He begets not, nor was He begotten, and there is none like
Him.” (Quran, 112:1-4)



Chapter 112 of the Quran written in Arabic calligraphy.


No one has the right to be invoked, supplicated, prayed to, or shown
any act of worship, but God alone.

God alone is the Almighty, the Creator, the Sovereign, and the
Sustainer of everything in the whole universe. He manages all affairs.
He stands in need of none of His creatures, and all His creatures
depend on Him for all that they need. He is the All-Hearing, the All-
Seeing, and the All-Knowing. In a perfect manner, His knowledge
encompasses all things, the open and the secret, and the public and
the private. He knows what has happened, what will happen, and how it
will happen. No affair occurs in the whole world except by His will.
Whatever He wills is, and whatever He does not will is not and will
never be. His will is above the will of all the creatures. He has
power over all things, and He is able to do everything. He is the Most
Gracious, the Most Merciful, and the Most Beneficent. In one of the
sayings of the Prophet Muhammad , we are told that God is more
merciful to His creatures than a mother to her child.1 God is far
removed from injustice and tyranny. He is All-Wise in all of His
actions and decrees. If someone wants something from God, he or she
can ask God directly without asking anyone else to intercede with God
for him or her.

God is not Jesus, and Jesus is not God.2 Even Jesus himself rejected
this. God has said in the Quran:

Indeed, they have disbelieved who have said, “God is the Messiah
(Jesus), son of Mary.” The Messiah said, “Children of Israel, worship
God, my Lord and your Lord. Whoever associates partners in worship
with God, then God has forbidden Paradise for him, and his home is the
Fire (Hell). For the wrongdoers,3 there will be no helpers.” (Quran,
5:72)

God is not a trinity. God has said in the Quran:

Indeed, they disbelieve who say, “God is the third of three (in a
trinity),” when there is no god but one God. If they desist not from
what they say, truly, a painful punishment will befall the
disbelievers among them. Would they not rather repent to God and ask
His forgiveness? For God is Oft-Forgiving, Most Merciful. The Messiah
(Jesus), son of Mary, was no more than a messenger… (Quran, 5:73-75)

Islam rejects that God rested on the seventh day of the creation, that
He wrestled with one of His angels, that He is an envious plotter
against mankind, or that He is incarnate in any human being. Islam
also rejects the attribution of any human form to God. All of these
are considered blasphemous. God is the Exalted. He is far removed from
every imperfection. He never becomes weary. He does not become drowsy
nor does he sleep.

The Arabic word Allah means God (the one and only true God who created
the whole universe). This word Allah is a name for God, which is used
by Arabic speakers, both Arab Muslims and Arab Christians. This word
cannot be used to designate anything other than the one true God. The
Arabic word Allah occurs in the Quran about 2700 times. In Aramaic, a
language related closely to Arabic and the language that Jesus
habitually spoke,4 God is also referred to as Allah.

2) Belief in the Angels:
Muslims believe in the existence of the angels and that they are
honored creatures. The angels worship God alone, obey Him, and act
only by His command. Among the angels is Gabriel, who brought down the
Quran to Muhammad .

3) Belief in God’s Revealed Books:
Muslims believe that God revealed books to His messengers as proof for
mankind and as guidance for them. Among these books is the Quran,
which God revealed to the Prophet Muhammad . God has guaranteed the
Quran’s protection from any corruption or distortion. God has said:

Indeed, We have sent down the Quran, and surely We will guard it
(from corruption). (Quran, 15:9)

4) Belief in the Prophets and Messengers of God:
Muslims believe in the prophets and messengers of God, starting with
Adam, including Noah, Abraham, Ishmael, Isaac, Jacob, Moses, and Jesus
(peace be upon them). But God’s final message to man, a reconfirmation
of the eternal message, was revealed to the Prophet Muhammad . Muslims
believe that Muhammad is the last prophet sent by God, as God has
said:

Muhammad is not the father of any one of your men, but he is the
Messenger of God and the last of the prophets… (Quran, 33:40)

Muslims believe that all the prophets and messengers were created
human beings who had none of the divine qualities of God.

5) Belief in the Day of Judgment:
Muslims believe in the Day of Judgment (the Day of Resurrection) when
all people will be resurrected for God’s judgment according to their
beliefs and deeds.

6) Belief in Al-Qadar:
Muslims believe in Al-Qadar, which is Divine Predestination, but this
belief in Divine Predestination does not mean that human beings do not
have freewill. Rather, Muslims believe that God has given human beings
freewill. This means that they can choose right or wrong and that they
are responsible for their choices.

The belief in Divine Predestination includes belief in four things: 1)
God knows everything. He knows what has happened and what will happen.
2) God has recorded all that has happened and all that will happen. 3)
Whatever God wills to happen happens, and whatever He wills not to
happen does not happen. 4) God is the Creator of everything

Thank You

—————————


For more information about Islam

http://english.islamway.com/

http://www.islamhouse.com/

http://www.discoverislam.com/

http://www.islambasics.com/index.php

http://english.islamway.com/

http://www.islamtoday.net/english/

http://www.islamweb.net/ver2/MainPage/indexe.php

http://www.sultan.org/

http://www.islamonline.net/

Contact Us At

Imanway.group@gmail.com

 

[Meat Plow]

On Thu, 25 Jun 2009 15:32:41 -0700, Daniel Prince
<neutrino1@ca.rr.com>wrote:

I use my Lenovo IBM THINKPAD T60 1953 in bed. When I am not using
it, I put it into a garage I made on the side of my bed. I bought
the laptop used in April 2008. In late July 2008 the cable of the
power supply started to fail. It would connect and disconnect
itself when it was moved slightly.

If the plug is pressing on a body part it will keep failing.

 

[Lee]

Wild_Bill wrote:

Straight power cord connectors typically put more stress on the power
connection than right-angled connectors do, but manufacturers insist on
using straight connectors in most cases, as they may be a couple of
cents cheaper (SWAG).

A right-angle connector, in combination with a temporary anchor point on
the instrument's case near the port, would be a much more durable
connection.

YMMV and IME of course, but I've had to repair more laptop power sockets
used with right angle connectors than straight ones. Mainly I think
because the right angle ones tend to stay in if the cable is snagged,
where the straight ones just pull out.

Right angle plugs themselves do seem to survive longer than straight
ones though

Lee

 

[Daniel Prince]

"larry moe 'n curly" <larrymoencurly@my-deja.com> wrote:

I don't like using laptops on my laptop because it blocks the air flow
underneath, and moving around the hard disk so much can't be good for
it.

I keep my laptop on a laptop cooler with two fans. The cooler I
keep on a plastic cutting board. I put the cutting board on a
pillow on my lap. I think both my lap and the computer stay cool
enough.
--
I don't understand why they make gourmet cat foods. I have
known many cats in my life and none of them were gourmets.
They were all gourmands!

 

[Daniel Prince]

"larry moe 'n curly" <larrymoencurly@my-deja.com> wrote:

I find it hard to believe that two power packs would fail, especially
when they each measure normally, but have you tried measuring each
while a 10-100 ohm load is applied to the DC output?

I pulled enough of the electrical tape off of one of the supplies so
that I could measure the voltage with it plugged into the laptop.
The voltage was still 20.1 volts.
--
I don't understand why they make gourmet cat foods. I have
known many cats in my life and none of them were gourmets.
They were all gourmands!

 

[Meat Plow]

On Sat, 27 Jun 2009 04:31:22 -0700, Daniel Prince
<neutrino1@ca.rr.com>wrote:

"larry moe 'n curly" <larrymoencurly@my-deja.com> wrote:

I find it hard to believe that two power packs would fail, especially
when they each measure normally, but have you tried measuring each
while a 10-100 ohm load is applied to the DC output?

I pulled enough of the electrical tape off of one of the supplies so
that I could measure the voltage with it plugged into the laptop.
The voltage was still 20.1 volts.

Is that while the laptop fails to operate?

 

[Daniel Prince]

Meat Plow <meat@petitmorte.net> wrote:

On Sat, 27 Jun 2009 04:31:22 -0700, Daniel Prince
neutrino1@ca.rr.com>wrote:

"larry moe 'n curly" <larrymoencurly@my-deja.com> wrote:

I find it hard to believe that two power packs would fail, especially
when they each measure normally, but have you tried measuring each
while a 10-100 ohm load is applied to the DC output?

I pulled enough of the electrical tape off of one of the supplies so
that I could measure the voltage with it plugged into the laptop.
The voltage was still 20.1 volts.

Is that while the laptop fails to operate?

Yes.
--
I don't understand why they make gourmet cat foods. I have
known many cats in my life and none of them were gourmets.
They were all gourmands!

 

[Meat Plow]

On Sat, 27 Jun 2009 11:39:49 -0700, Daniel Prince
<neutrino1@ca.rr.com>wrote:

Meat Plow <meat@petitmorte.net> wrote:

On Sat, 27 Jun 2009 04:31:22 -0700, Daniel Prince
neutrino1@ca.rr.com>wrote:

"larry moe 'n curly" <larrymoencurly@my-deja.com> wrote:

I find it hard to believe that two power packs would fail, especially
when they each measure normally, but have you tried measuring each
while a 10-100 ohm load is applied to the DC output?

I pulled enough of the electrical tape off of one of the supplies so
that I could measure the voltage with it plugged into the laptop.
The voltage was still 20.1 volts.

Is that while the laptop fails to operate?

Yes.

Well if you want to peel the laptop apart, inspect the connector and
soldering. I've repaired several HP laptops that failed because the
pin in the connector became loose where the back of it was punched
into the lead going down to the board. Others were broken at the
solder union and others were broken inside the solder. Seems to be an
HP thing though. Dells generally have a fairly robust arrangement
inside and fail atthe plug end. My Asus also had a plug failure by
design. I found a 90 degree plug and spliced it onto a Dell supply and
have been using it for a couple years.

 

[Daniel Prince]

Meat Plow <meat@petitmorte.net> wrote:

Well if you want to peel the laptop apart, inspect the connector and
soldering.

I bought a new power jack and it plugs in to the motherboard rather
than being soldered. I got a service manual pdf file and it says
that the screws used in the Thinkpad are nylon coated and should not
be reused. Is it really necessary to use new screws?

The manual does not really say how to replace the power jack. It
does say that to replace the 1200 Structure frame, I need to:

For access, remove these FRUs, in order:
v “1010 Battery pack” on page 63
v “1020 Ultrabay Slim device” on page 64
v “1030 Hard disk drive cover, hard disk drive, and hard disk drive
rubber rails” on page 65
v “1040 Palm rest or palm rest with fingerprint reader” on page 67
v “1060 Keyboard” on page 75
v “1070 Modem daughter card (MDC-1.5)” on page 77
v “1080 PCI Express Mini Card for 802.11 a/b/g wireless LAN” on page
79
v “1100 PCI Express Mini Card for wireless WAN” on page 83
v “1120 Keyboard bezel and wireless WAN antenna cable (AUX)” on page
86
v “1130 Fan assembly” on page 89
v “1150 LCD assembly” on page 94
v “1160 Base cover” on page 98
v “1190 SIM card slot” on page 1061

Then it says to

Remove the ac power jack cable.

I am hoping that I will not have to remove all those parts. Do you
know which ones I will have to remove?
--
I don't understand why they make gourmet cat foods. I have
known many cats in my life and none of them were gourmets.
They were all gourmands!

 

[JB]

Well if you want to peel the laptop apart, inspect the connector and
soldering.

I bought a new power jack and it plugs in to the motherboard rather
than being soldered. I got a service manual pdf file and it says
that the screws used in the Thinkpad are nylon coated and should not
be reused. Is it really necessary to use new screws?

You will find out as you take it all apart at your large ESD prepared bench.

Be aware of type and length of screws and other odd hardware as you take it
apart them. If you put a long screw in a short hole, or miss a shim or
washer, it will dimple the outside surface, short something or break the
retainer. Pay close attention. A digital camera and quick sketch has been
handy. If the screws are Nylon coated, then use a spot of Permatex thread
locker blue. If they are nylon screws, they will likely distort or break
the heads off if over-torqued.

Power Jack plugs into MOBO? If you say so. How do you replace the jacks
that the jack plugs into? Bet it's soldered. The answer would have been a
replaceable jack bolted to the frame with a cable to the MOBO rather than
directly to the MOBO, but that would have been .0001c too much for large
scale production cost. You must realize that cost is a far greater concern
than customer satisfaction, or everybody would be taking the garbage back to
where they bought it for a refund. People would be sitting at a desk in an
air conditioned room with an expensive piece of office equipment rather than
taking a cheap toy out to play in the dirt.

If the screws are Nylon coated, then use a spot of Permatex thread locker
blue. If they are nylon screws, they will likely distort and break the
heads off if over-torqued. If you put a long screw in a short hole, it will
dimple the outside surface, short something or break the retainer. Pay
close attention.