Terry Coombs wrote:
Retired wrote:
On 4/3/14, 4:01 PM, Terry Coombs wrote:
There was a lot of knowledge displayed above in the "computers"
thread so ...

My 22" LCD just went dark . When the comp is hooked to it the
power light does go green when I input , so I'm fairly sure the
logic board is OK . I've disassembled it and the CCFL's look OK and
none of the caps on the power supply are bulged . I'm not sure it's
worth fixing if it means throwing parts at it . I'd like suggestions
on testing the power supply , and yes I know there are some pretty
high voltages present . The CCFL's are a bit dark on the ends , but
not as bad as photos of failed units I found on the interwebs .


What make / model ?? Does it not have any front or side panel
setup/test buttons ??

Envision Model G22LWk . It does have setup buttons on the front lower
center , pushing them in any sequence does nothing . Push the power
button and the light comes on green . If not hooked to a system it'll
go amber . This thing kinda flickered once then went dead . I thought
it might be the backlight tubes , but they look OK . Bad caps on the
power supply are a known source of problems , but none of these are
bulged or leaking . I'm a bit lost here . This comp I'm using is
where it belongs , and it runs this old CRT unit just fine ...

Have you checked it out under varying light conditions to see if you can see the
computer image by reflected light off the screen? If you can, that indicates
that the backlight is the problem. The monitor I'm using currently had an
intermittant backlight problem, which I fixed by re-setting the connectors
associated with the backlight. There are lots of sites discussing repairing
backlight problems.

I've fixed several other LCD monitors by replacing bad capacitors, but they were
usually obvious. I picked up a freebie 50" plasma TV that didn't work and
replaced $8 of capacitors to fix it.