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Sorry about the delay, I have been in hospital getting my appendix removed!
All good now :)
F9700 has voltage on both sides. 8.4v (no battery or screen connected)
P1,2,5,6 - 1.84v
Computer appears to start, then trips out.
Bench PSU shows draw from .25ma to approx 1amp after 1 second. which then resets and starts again.
Client says it sometimes turns on normally.
Some kind of over voltage protection or a shorted component tripping a circuit?
Not sure where to start...
Sorry for the long delay. I have been in hospital having my appendix removed.
I replaced U7600, however before i had time to properly check all the output pins etc I must have shorted something because I smelt the bad smoke and now the laptop won't turn on. Looks like it's back to the...
We replaced R7601 and now have 5v at pin 13
PP1V05_S0 has 300mv.
P1VO5S0_DRVH - 300mv
..................... DRVL 0v.
.......................... LL 300mv
..................... . VBST 5v
P1v05S0_Boot_RC drops to 300mv after C7630
Sorry .. I realize now that there must be power coming from u7200 CPUVR-Pgood so the issue lies elsewhere I think?!
PP3v3_S0 - 3.5v
PP1v5_S0 - 1.508v
Computer turns on, no chime, keyboard light or video.
Tested CPU power coils 0v.
ALl SYS PWRGD 3.5v
PP3V3 S0 us 3.5v however I get no voltage at 2 of R1950 - should I replace this resistor? (CPUVR PGOOD)
Does anybody have schematic for the above computer?
Also can anybody recommend an alternative wire for running leads ? I can't find anything locally (Australia) and many Amazon sellers don't ship to Australia.
I saw your video on this topic yesterday!
For it to be valuable to us long term the association / accreditation process would have to do at least one of two things...
1. Give us skills to do work we currently are not able to do
2. Deliver us customers we currently do not get...
BKLT_EN_R sometimes seems to drop to 0v with corresponding drop on backlight circuit from 45v to 12v
I'll test with another screen, sorry. I don't have them lying around yet like you guys do for testing!