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if you have another screen i would test with that. if still no video i would check the u9000 and area for the correct voltage( check while known good screen is plugged it).

did you check for video on external monitor?

i would check the current sensing resistors on acin(r7010/r7011) and make sure they are correct, then just to be safe( when its not working) check for short to ground on smc_bc_acok(pin 14). if all is well change u7000.

first think i would do is to check to see if the proper voltage is getting to the mosfet. then i would change the lvds connector and cable

Sorry took me a minute to get back to this project board. i checked for avref on u5010 pin1 and had .970v also checked pin8 to have .950v. so obvious issue there. i also checked the readings for the ASD failures to find. ID0R is running ar 6.311Amp instead of 4.6Amp, VP0R is running at 19.763v...

ok. replaced the SMC again with one i ordered off the internet. Still same issue. Could be that that one was bad also iguess. i had one come in yesterday with same issues (water damage, got it to boot to asd with same errors). Wondering if maybe something is not right with the trace on the data...

Ive got this board here 820-3115 that I've been working on, It had been water damaged pretty good. i had to replace a few components one of them being the smc. the machine now powers on and will boot into os, but fails ASD EFI test for the following... sensor- current(ID0R) dc in--- reading...

yes this is a hdd temp sensor. If you have one of these you will have to bypass it in some way. I usually just switch it with the dye type sensor off an older iMac. I would try this with a tested working internal screen/cable. You could run both ASD OS and ASD EFI and see what it tells you.

i've got this 820-2850 with the non surprising no video issue. everything powers powers on and runs but no video on internal or external. i caught the video where pp1v8r was at 1.3v and louis injected 1.8v to make it work again. before i do that i noticed that on diode mode pad 1 of L9560 is...

found short to ground on pin 2 of d6950, tracked back to pin2 of r5281, removed r5281 and found short to ground on the pad going to the smc. I also found there to be a short on pin 1 of r5281 which i traced back to pin 1 of r6995. still not sure how this resistor could have a short to ground...

ppbus_g3h is 12.28v. R7940 0.001v. in diode mode 0.5551. L7260 has a low diode mode measurement of 0.130. Yes i have a green light on the charger. i checked U7201 and it is receiving the 12.28v on vin but nothing on the enable signals.

no voltage at L7260

yea i agree with you, I'm not questioning you... just new to this and not that great at reading the schematics yet. Sorry for the inconvenience.

i have no way of check the battery really. but i checked and in diode mode on pin 13 of u7600 i get 0.374. maybe something went crazy and shorted some of the smc out. seems like i tend to get a lot of bad smc's. is that pretty common for water damaged machines?

PPBUS_G3H is at 12.28v after i changed the isl6259 out for the second time. don't really want to plug in the battery and blow another isl6259 chip. i noticed u7600pin 13 is at 0.012v with no short to ground.

thats what i was thinking too. i did some poking around to find smc_reset_L at 3.3v. I'm missing a bunch of power rails. it doesn't get warm anywhere on the board so not sure what would be causing this.

q7055 has 8 pins 4 of which are input from battery as ppvbat_g3h. machine did not power up when connected to 85w charger. i show .427 in diode mode on F7040. But i just noticed that after i unplug the charger in diode mode it starts at -1.6 then goes to 0.427. so probably a weak short?

Here's another fun one. 820-3332-A board this board had been brought in for beer spill. i get green light on charger but only had 1.7v on ppbus_g3h.Looked to be a problem with isl6259, i changed it out and got 12v back on ppbus_g3h. Plugged a battery in smelled something smoking, unplugged...

i have the same issue on my kids iPad min. I noticed that when it charges and turns back on if you shut it off it will charge to 100%. I'm guessing its current sensing issue but to lazy to fix my own crap.

I've got this 820-3115 that she pressing the power button powers on then right off, but iff i hold the power button for 8 seconds says on and runs just fine. Note: this machine did have a short to ground in the isl6259 and was replaced as well as some water damage around the smc area. i also...