Re: HP w20 LCD Display Inverter, running out of options.
- Yes and no. I heated the board and caps with hairdryer, yet it took about an hour or so before backlights shut down.
- I've applied cold spray to components, one by one and when I got to HV caps it once booted and stayed on longer, so I switched those caps but the problem remained. And later I've noticed that sometimes (very rarely) it may boot up almost immediately afted lights go off.
- Monitor is gettin much worse again. It now keeps lights on only about 15 to 20 minutes which is close to what it was when I got it.
- There seems to be no correlation anymore. For instance last evening:
50% brightness:
-> 28 minutes on -> Lights off-> Turned off/on -> 2 secs to black
-> 15 minutes off
-> 14 minutues on -> Lights off -> Turned off/on ->2 secs to black
-> 16 minutes off
-> 2 hours 14 minutes on->Lights off -> Turned off/on -> 2 secs to black
Today:
50% brighness:
-> 34 minutes on -> Lights off -> Turned off/on ->2 secs to black
-> 4 minutes off
-> turned brighness to 90%
-> 1 hour and 4 minutes on -> Lights off -> Turned off/on ->2 secs to black
-> 2 hours off while I watched a movie
-> 12 minutes on -> Lights off -> Turned off/on ->2 secs to black
-> 5 minutes off
-> 15 minutes on -> Lights off -> Turned off/on ->2 secs to black
-> 1-2 minutes off
-> already 20 minutes on -> Lights off -> Left it (on) for 15 minutes
-> Turned off/on and on immediately.
I can turn it on but 95% of the cases it's 2 secs to black. Usually it has to cool down first. Sometimes it takes only a few minutes to get lights back on, then it usually does not last on for very long before lights go off again. It may stay on for an hour even so (this really drives me crazy).
When backlights shut down, green light always stays on and LCD and sound works fine. If I let it stay on "on" for about 15 minutes and then turn it off/ on again, it starts operating normally. It heals even with powers on as long as backlights are off for a while.
No, and I've tried this several times.
Power is there and when it's on operating normally voltages are 5.1 V and 12.5 V. When lights go off they change to 4.95 V and 14.11 V and they stay there until power is switched off/on again.
CCFL's are allright, with rev 3 board this monitor does not shut down.
Thanks. I just got curious as that line going to logic board had 1000 ohms instead of zero in rev 3. It looked like a huge difference to me.
Originally posted by Aruba
- I've applied cold spray to components, one by one and when I got to HV caps it once booted and stayed on longer, so I switched those caps but the problem remained. And later I've noticed that sometimes (very rarely) it may boot up almost immediately afted lights go off.
- Monitor is gettin much worse again. It now keeps lights on only about 15 to 20 minutes which is close to what it was when I got it.
Originally posted by Aruba
50% brightness:
-> 28 minutes on -> Lights off-> Turned off/on -> 2 secs to black
-> 15 minutes off
-> 14 minutues on -> Lights off -> Turned off/on ->2 secs to black
-> 16 minutes off
-> 2 hours 14 minutes on->Lights off -> Turned off/on -> 2 secs to black
Today:
50% brighness:
-> 34 minutes on -> Lights off -> Turned off/on ->2 secs to black
-> 4 minutes off
-> turned brighness to 90%
-> 1 hour and 4 minutes on -> Lights off -> Turned off/on ->2 secs to black
-> 2 hours off while I watched a movie
-> 12 minutes on -> Lights off -> Turned off/on ->2 secs to black
-> 5 minutes off
-> 15 minutes on -> Lights off -> Turned off/on ->2 secs to black
-> 1-2 minutes off
-> already 20 minutes on -> Lights off -> Left it (on) for 15 minutes
-> Turned off/on and on immediately.
Originally posted by Aruba
When backlights shut down, green light always stays on and LCD and sound works fine. If I let it stay on "on" for about 15 minutes and then turn it off/ on again, it starts operating normally. It heals even with powers on as long as backlights are off for a while.
Originally posted by Aruba
Originally posted by Aruba
CCFL's are allright, with rev 3 board this monitor does not shut down.
Originally posted by Aruba
Comment