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This was a freebie with no history etc - it works, but pressing any of the
setting buttons displays a padlock symbol on the screen.
Anyone know how to unlock it?
The Dell website wasn't much help, and it looks too old to find the manual.
Thanks for any help.
On Mon, 19 Oct 2015 20:27:00 +0100, Ian Field wrote:
This was a freebie with no history etc - it works, but pressing any of
the
setting buttons displays a padlock symbol on the screen.
Anyone know how to unlock it?
The Dell website wasn't much help, and it looks too old to find the
manual.
Thanks for any help.
You can get the Service Manual here:
http://monitor.net.ru/forum/pafiledb/uploads/4763b32b4eb1799662f8a3e2eda5a5cd.pdf
It says:
"Press the 'Menu' button for over 15 seconds to unlock the OSD Menu"
When the neocon-men in Washington start WW3, remember that the Russians
helped you.
Yes, you hold the menu button down for 10 seconds. When the padlock goesThis was a freebie with no history etc - it works, but pressing any of the
setting buttons displays a padlock symbol on the screen.
Anyone know how to unlock it?
The Dell website wasn't much help, and it looks too old to find the
manual.
Thanks for any help.
Ian Field wrote:
This was a freebie with no history etc - it works, but pressing any of
the
setting buttons displays a padlock symbol on the screen.
Anyone know how to unlock it?
The Dell website wasn't much help, and it looks too old to find the
manual.
Thanks for any help.
Yes, you hold the menu button down for 10 seconds. When the padlock goes
from locked to open, release the button.
I had one that got soda spilled into the little PC board with the button
switches, and it ended up in the locked state once the board was cleaned.
So, I had to unlock it.
The Dell monitor I had this problem with had 4 buttons. The power buttonThe one I'd been using was scrounged on a free recycling group, they told
me it was faulty and the buttons were dodgy, like something had been
spilled down the front.
After cleaning the button PCB, I reflowed all the solder joints in the
hope the heat would desiccate any lingering residues. It seemed OK for a
while, but soon became apparent that the buttons had a life of their own
in humid weather.
Ian Field wrote:
The one I'd been using was scrounged on a free recycling group, they told
me it was faulty and the buttons were dodgy, like something had been
spilled down the front.
After cleaning the button PCB, I reflowed all the solder joints in the
hope the heat would desiccate any lingering residues. It seemed OK for a
while, but soon became apparent that the buttons had a life of their own
in humid weather.
The Dell monitor I had this problem with had 4 buttons. The power button
was fine, the other 3 had trouble at different times. They have a small
surface-mount capacitor on the back across each button switch. The
switches
appeared to be well-sealed, but the soda stuff gut under the caps, ate
some
of the PC board, and caused lingering conduction. So, I removed all the
caps, severely scrubbed the PC board with solvent and a toothbrush, and
soldered on, I think, 1000 pF caps where the bad ones were. This has
solved
the problem.
Your results sound EXACTLY like what mine was doing, and I had to remove
the
caps, clean and replace with new caps. Most likely, it would work fine
without the caps. (I have quite a big stash of SMT parts as I assemble PC
boards.)