Search results

Of course, thanks, that got me there. It's working now. Much appreciated.

I have an 820-4924 that had an absolutely mangled U7100 area. I replaced everything and had to run wires for both R7151/R7152 and R7121/R7122. I've measured all the components and have continuity throughout, but it's still at 16.5V. R7151/R7152 is connected to R7150 and pins 17 and 18. And...

This board is booting but running slow. It was liquid-damaged but looks pretty clean after coming out of the ultrasonic cleaner. I'm not finding any areas that look damaged. Online test is giving "There may be an issue with the SMC" error. Not sure where to go next with this.

I was booting from an external drive with OSX. I tried booting into Hiren's Windows and hitting the power button didn't affect anything. It kept running normally. The keyboard was functional and I held down the power button to turn it off. Any Mac system I boot into, whether it's on the internal...

SMC_ONOFF_L is 3.4V with the keyboard plugged in. R4810 and C4810 are good. Keyboard connector doesn't look like it was hit at all and is completely clean, as is the area around the SMC. Replaced U5110, no change.

Yes, and it does the exact same thing with each one.

This is an otherwise functional computer that will freeze if you tap the power button. This happens with any keyboard/trackpad combination so it's something with the board. After it freezes the only option is to hold the power button down to shut it down. I have no idea what would cause...

PCH_SRTCRST_L and PP3V0_G3H are at 2.7V. PP3V3_G3H is at 3.4V.

RTC_RESET_L is at 2.7V. R5112 has 1.7V. Outside of that I'm not sure where else to look for 32KHz oscillation.

Any idea which sensor it might be? Or is it just possibly one of many? The only corrosion or damage was a little bit on the battery connector and near the keyboard backlight connector.

Yes, the same original 85W MagSafe 2 power adapter I always use. I noticed that PM_SLP_S3_L does come up once every time I plug it in and drops down immediately. I tried it with battery-only a number of times and it was turning on normally. But after going back to trying it on adapter-only...

This board is switching between 3.3V and 0V on P3V3S0_EN (from PM_SLP_S3_L). It will work fine and the screen will come on and then next time I turn it on it will have no P3V3S0_EN (no PM_SLP_S3_L) and 3V3_S0 gets stuck at 1.9V. The only damage I can find was on the via leading to R8319. I...

PM_SLP_SUS_L is the only one that's showing any sign of life. It's not pulsing in the normal up and down way, it's just bouncing around at very low voltage levels. All the other PM_SLP_Sx_L signals lines are at 0V. No shorts on anything that I can find. IR camera isn't picking up any heat. No...

Yes, PP1V2_S5SW is at 0V on a good board. If it's a BIOS issue, I'll just let this go. Can't afford to spend the time on that. Thanks.

R7090 is either gone or has been moved to a place that's not very obvious. I can't find it. I went off of what looks like R8592. SMC_AUX_OK is also nearly impossible for me to locate. That whole area around R5187 is completely different.

I believe I found SMC_RESET_L and it's at 3.3V

As different as this board is from the older ones, the CD3215 areas are laid-out almost identically so I think the 820-00239 is pretty accurate there. Diode measurements are all the same at around .180. Slightly higher than the older boards. I'm guessing PPBUS should be 13V and yes, this is an...

This board had very minor liquid-damage. The side that didn't have any visible liquid-damage is cycling every 5 seconds from 5V on F3000 and F3001. The other side stays steady at 5V. PPBUS is at 12.3V. LDO voltage is coming up to 3.4V and PP3V3_G3H is also coming up to 3.4V. I haven't been able...

SMC bypass didn't change anything. Comparing it to a good board, every voltage I can possibly check is there.

Thanks, yeah, I wish I had time but I don't reball or replace SMC's anymore. I just have too many boards to work on. If a reflow doesn't fix it I just sell them as-is, even if I know it's just an SMC replacement or reballing. As far as holding up, all of our repairs are for computers we bought...