Recent content by matthewgreene

Voltage on all coils, and the CPU is heating. I can't swear to USB activity, but my USB mouse seems to be responding. Next Step?

Okay... just to clarify: by power up, you mean put the board back in the case and try to boot it? Do I need the battery hooked up to do this?

I guess I’m going to have to ask for clarification again; I’m not sure what you’re asking when you say the “state of the board.” From my perspective the board, seems to have expected power in the expected locations. Previously, I asked if I should try to boot the board, to which you replied I...

Sorry, am I just looking for USB activity at this point? The major thing that happened was power restored to all major lines on the board, 5.25 V @ USB, and me asking if I should try to boot this board. You wrote that I should try a known good BIOS. I reflashed the BIOS with the file you linked...

Thank you. BIOS installed.

I didn't look. As I mentioned, I'm totally new on this forum; I came because the forum is advertised as, more-or-less, providing a resource that can walk you through logic board repair. This is most difficult logic board repair I've encountered, hence, here I am. I am unaware of the breadth of...

Dr. BIOS

MBP112.0138.B16

Okay... sorry that you have to walk me through this, but BIOS is flashed.

PLT_RESET_L is 3.3 V Pardon my total ignorance once again here, but can you please provide some clarification regarding 'trying a known good BIOS,' please? I'm not sure how to do that. Again, my apologies for my total ignorance here.

Nothing with my USB mouse, in that that laser didn't come on, but checked with my USB ammeter, and have 5.25 V @ USB

Prior to my message yesterday, I replaced a few components and this is the state of the board currently. I haven't tried anything other than replacing those components; now that I've replaced them, I have power back at those specific components. Should I put the board back in the case and try to...

Okay... I replaced a bunch of stuff on this board, and I have 1.8 V at both L7310/20 Pins 7 and 3 on U1950 - 3.4 V ALL_SYS_PWRGD - 3.3 V What are my next steps here? Thanks for your help.

Okay... Checking them all again: L7720 -- 5.14 L7430 -- 1.20 L7630 -- 1.05 L7870 -- 1.50 ALL_SYS_PWRGD -- 0 That said, I followed ALL_SYS_PWRGD, which is when I realized that U1860 is actually missing. I'm going to have to go through and look at all of these pads that have no components on...

Okay, sorry about that; my fault again; PM_SLP_S0_L is 3.3 V I've check both 7310/20 again--at least a dozen times--and nothing. No power at pins, 7 or 3, but just to confirm that everything was working as expected based on what is known thus far, I confirmed the 3.42 V on pin 8.