Recent content by Rford

Removed Q1850, All_Sys_pwrgd reading 3.3v now. Still no power to CPU. No PP1V05_S0. 1.7V at PPVCC_S0_CPU.

Sorry, I must've had a long day that day. R8162 is no stuff... Not 8167, 8167 is indeed there. I removed R8168, R8164, R8165, and R8166, one by one and ALL_SYS_PWRGD Did not change.

I will attempt, however, it looks as if its a nostuff. it looks factory, not knocked off or removed.

So I read R8162, 64, 65, 66, R1962-All within range There is no R8167 on this board Thoughts?

Excellent, I will check this out and report back

Ahh. Ok. What would be an example of this?

What do you mean by that first sentence?

Nothing on ALL_SYS_PWRGD Nothing on P7 and P3 U1950

Have a 00165 that goes to full fan immediately upon plug-in (regardless of TP). Checked all rails are present except no VCORE. Noted some solder balls around C1031, but other than that the board looks absolutely fine. All 3.3 V present, all 5V present, all 1.8V present (except VCORE), all 1.2V...

J8300 P1: 0V U7701: P5: 5V P18: 5V P17: 3.3V P11: 12.42V Q7706 P1,2,5,6: 0V P3: 12.5V P4: 12.6V Looked in J8300 and it looks fine.

2informaticos Got a known good... still has image, but no bklt... :-?

Resistance to ground at pin 1 is 1.23 with screen unplugged. 0 with screen plugged in (suggest short in screen?) Continuity from pin 1 to D7701- Yes F7700- good voltage to both sides U7701: Pin 5: 5.03V Pin 18: 5.03V Pin 17: 3.3V Pin 11: 12.5V Think the resistance to ground with the screen...

Resistance to ground at pin 1 is 1.23 with screen unplugged. 0 with screen plugged in (suggest short in screen?) Continuity from pin 1 to D7701- Yes F7700- good voltage to both sides U7701: Pin 5: 5.03V Pin 18: 5.03V Pin 17: 3.3V Pin 11: 12.5V Think the resistance to ground with the...

I will check. My other question is, is there a way to reliably test a screen backlight without getting a new one? I am out of known good, am at a down point in cash flow so can?t buy a known good and cant afford to take the hit of buying a new one if it?s indeed not the problem.

Have a late 13 3662 with no back light and MagSafe stays orange (no charge in battery) history is that water from a faucet dropped on Apple logo over some time. Display works fine, backlight does not. pin 1 at lcd bkltboost registered 0v. No real corrosion on board. Do you think it could simply...