Hi,

I just bought 3 Compaq s910 monitors and I have a problem with 2 of them.

1: Takes a while untill power supply works (10sec or so)(first you hear small ticks)

2: Same problem as 1 , but also vertical amp problem. not 100% screensize, distortion if moved up and down. Horizontal size is ok
Works with TDA4861 vert amp --> replaced it and still the same problem.

1 must be a common fault, anyone can help me out on this?
Thx in advance,

Luke

Check NP elkos in primary PWM IC supply.
I think 470nf/400v * 1 pcs or so is good replacement.

Also check the two 100uf 250V non polarised capacitors just behind the power switch. I have found these to cause intermittent power on or no power on; these are in the circuit that feeds the supply to the PWM chip.

Hi
I been having difficulty finding a supplier for 1mfd 250v non polar capacitors.Can anyone help ??

Thanks for your valuable information...
I have a compaq S910 PE1132 that was doing that takes 1 minute to turn on.....
takes 5 mins to turn on.....
until finally it just got ridiculous
takes 1 hour to turn on.....
thingy---
Time to fix it, your information was extemely valuable.

The 2 bipolar 1uF 250V capacitors right behind the Power Switch (C843 and C829.. I think) in series were the culprits. Actually only C843 NEEDED replacing, it had leaked electrolyte onto the PCB and had sweated down to <.5uF and yes there is a darkened area on the PCB from heat around these items!

I replaced my caps with 1uF 350V polarised caps I picked up from a local electronics store seeings how the PCB has the polarity shown for them (the curved line is negative end). And viola, works as soon as it is turned on - and it enters standby mode correctly now too!

Thanks again for the information

Is it possible you might have a Q401 listed in your unit....I've a Compaq V910 and wondered and hoped it might be one and the same component. Mine is a large 3pin comfiguration mounted to large heatsink. 1 pin hardwired to 450wv electrolytic. Sound familiar?!? (Crosses fingers)

Hi Q401 in the S910 is in the Horizontal output.

Rich

Next time you got your head stuck in the back of that monitor...eyeball the #'s on Q401 plz sir.

Q401 is not the HOT.

Rich

Hello
I have the same problem of you on S910 monitor
have you fin the solution for the vertical problem?

Christophe from France

errr read it again frog boy.

i've changed 2 capacititors 1uf/350v near pvm (c849)
and it's still same. 1min, 10 min, 100min to start. what's next?

sorry c842 and c 843 were changed with polarized as shown on pcb.........

I have the same problem with my Compaq S910. The vertical is compressed on the top halve of the monitor. I have changed the 2 electrolytes c305 and c318 to no avail. Did you replaced the vertical IC I301 TDA4861?

Tell ur boss that you want such an monitor on your work. The use it as an excuse for not working !!

i have a compaq s910 that works fine for awhile then the screen goes blank, power led is still green, you can turn the monitor off and back on and it will work for awhile then will do it again, the longer you use it the quicker it goes blank, i have tried it on several other computers and it does the same thing. any suggestions?

Anybody have any suggestions for the last post?