Magnovox DTV converter boxes shut off after a few sec.

[WKW]

I have three Magnovox TB100 and TB110 type DTV converter boxes with the
same problem: They won't stay on more then a few seconds or minutes. Anyone
ever found out what causes this? They are good units when they work and I
like them. The ones I have do tune stations and do everything they are
supposed to, just keep shutting off within a minute or less. I even got
into one a while back and checked all the caps with an ESR meter but found
none bad.

 

[Phil Allison]

"WKW"

I have three Magnovox TB100 and TB110 type DTV converter boxes with the
same problem: They won't stay on more then a few seconds or minutes.
Anyone
ever found out what causes this? They are good units when they work and I
like them. The ones I have do tune stations and do everything they are
supposed to, just keep shutting off within a minute or less. I even got
into one a while back and checked all the caps with an ESR meter but found
none bad.

** Looks like a common fault, Bob Urz posted the same Q here in January last
year:

" Anyone successfully work on these cheap DTV converter boxes?
I got a Magnavox TB100. It powers up and displays the TV channel.
Then it shuts itself off in about 5 seconds. I did get into the setup
menu and the auto shut off is set to off so i assume its not that.
Have not been inside of it to check the caps yet. Are these POS
even fixable? "

http://groups.google.com/group/sci.electronics.repair/browse_thread/thread/d1cceba0bc151243/66ed61895d535241?hl=en&q=%22magnavox+tb100%22+group:sci.electronics.repair



.... Phil

 

[Jeff Urban]

First of all we are dealing with junk, so we treat it as such.;

Get the thing on and when it is on, hold down a remote button, as well
as maybe in a separate test a keyboard button and see if the continual
input makes it stay on. If so it is probably a software problem. Scrap
it. Maybe.......

If it still shuts down there is a chance that it is a power supply
problem. Just because the caps don't have ESR doesn't mean the PS is
working fine. Monitor voltages.

And like any of the rest of this junk, if you don't find the problem
in hardware, it is in software, in which case the unit is usually
scrap. If there is a USB port you might be able to get firmware for it
and then you can go around "fixing" every one you see. But it's more
likely that they will become landfill.

You have any idea how fucking hard it is to grow tomatoes in TV
convertor boxes ? Just hope your house isn't built on a landfill.

J

 

[WKW]

"Phil Allison" <phil_a@tpg.com.au> wrote in
news:a37vouF9uqU1@mid.individual.net:

** Looks like a common fault, Bob Urz posted the same Q here in
January last year:

" Anyone successfully work on these cheap DTV converter boxes?
I got a Magnavox TB100. It powers up and displays the TV channel.
Then it shuts itself off in about 5 seconds. I did get into the setup
menu and the auto shut off is set to off so i assume its not that.
Have not been inside of it to check the caps yet. Are these POS
even fixable? "

http://groups.google.com/group/sci.electronics.repair/browse_thread/th
r
ead/d1cceba0bc151243/66ed61895d535241?hl=en&q=%22magnavox+tb100%22
+grou
p:sci.electronics.repair



... Phil

I found that post myself with a google search before posting my
question. Didn't find any replies to it though.

 

[Phil Allison]

"WKW"

"Phil Allison"



** Looks like a common fault, Bob Urz posted the same Q here in
January last year:

" Anyone successfully work on these cheap DTV converter boxes?
I got a Magnavox TB100. It powers up and displays the TV channel.
Then it shuts itself off in about 5 seconds. I did get into the setup
menu and the auto shut off is set to off so i assume its not that.
Have not been inside of it to check the caps yet. Are these POS
even fixable? "

http://groups.google.com/group/sci.electronics.repair/browse_thread/th



I found that post myself with a google search before posting my
question.

** Shame you did not post that fact.

Didn't find any replies to it though.

** Some questions have no answer...




.... Phil

 

[spamtrap1888]

On Jun 6, 4:38 am, "Phil Allison" <phi...@tpg.com.au> wrote:

"WKW"









"Phil Allison"

** Looks like a common fault, Bob Urz posted the same Q here in
January last year:

" Anyone successfully work on these cheap DTV converter boxes?
I got a Magnavox TB100. It powers up and displays the TV channel.
Then it shuts itself off in about 5 seconds. I did get into the setup
menu and the auto shut off is set to off so i assume its not that.
Have not been inside of it to check the caps yet. Are these POS
even fixable?  "

http://groups.google.com/group/sci.electronics.repair/browse_thread/th

I found that post myself with a google search before posting my
question.

 **  Shame you did not post that fact.

Didn't find any replies to it though.

** Some questions have no answer...

...   Phil

Priced to retail at $40, those boxes were put on the market in 2008
and are now failing in 2012. Ten dollars per year to watch an ancient
TV sounds fair to me.