Search results

I retook measurements and found that it goes to 2.4 volts then goes to 0.08 for both pin 12s. Not good.

Pins 12 on U7410 = 0.08 volts, but when I check pin 12 on U7100 this shows 2.4 volts. I think U7410 is bad because when I remove it, both pins are 5 volts.

Yes, I checked with and without internal LCD connected. I used a known good type C -> HDMI adapter. We use a couple of these for other MacBooks - working good. I found corrosion around C7416 and U7410 that deals with Phase 1 CPU VGT. The cap was a little burned on pin 1. What is CPUGT_GL1...

Everything seems to be pointing back to the Intel graphics. Is there anything else that can cause both the internal and external to fail?

These areas look pristine and has no signs of liquid. PP5V_G3S = 5.12 volts PPBUS_HS_CPU = 12.64 volts CPUCORE_PHASE1 = 0.89 volts CPUCORE_PHASE2 = 0.75 volts CPUGT_PHASE2 = 0.64 volts CPUGT_PHASE1 = 0.70 volts PVCCIO_PHASE = 0.97 volts CPUSA_SW_LL = 1.03 volts Very small traces of corrosion...

I can confirm USB activity with USB mouse. I tested it alone on desk as well as all parts connected. I also hear the charger connection noise coming from the computer when plugging in the charging cable. The MacBook is pulling 1 - 1.5 amps from the charger which is a pretty good sign. However...

Ohh okay, so with J6100/700 disconnected, it goes to 0.9 volts for both sides. With it connected, the normal 1.8 volts. I wasn't really thinking when I measured with/without the connections. SMC_LID is fine.. Anything to do with T2? What I don't understand is that customer heard a little...

I noticed the SMC_RIGHT_LID sometimes goes to 1.8 volts

There doesn't seem to be any USB activity. LED light normally blinks, but not in this case - just a solid light. No display on internal or external. SMC_LEFT_LID is 0.9 volts and SMC_RIGHT_LID is 0.9 volts.

Hello guys, I have a MacBook Air that came in for water damage that does not want to turn on. Customer said keyboard cover was on when water spilled. I opened it up and found almost no corrosion except on some caps. C78B7, C78B6 traces of corrosion, almost nothing to be concerned for. Pin 12...

Hello, I have a MacBook Pro Retina here where it does not turn after going to sleep for a long period of time. The only way to get it up and running again is if I disconnect the battery and reconnect with or without charger. The power button does work as I can turn it off forcefully or...

Thanks, it was the battery of the multimeter. PPBUS is fine @ 12.6 volts. I found out that U8020 was giving random voltages between 2 and 3 volts because it was chipped. Replacing the chip did the trick.

Hello, I have a 820-3476 that does not turn on (sometimes). If it turns on, it would be totally fine, but if I leave it or if I press force shut down it would be unable to boot up again unless I unplug battery, unplug charger and connect again. Even then it would be intermittent. PPBUS_G3H =...

Tried, but nothing. Closing up - unrepairable.

SMC_LID is 3.45 volts. USB activity is confirmed. Hmm..

I was putting this aside for a while. I'll give the USB drive with LED a try. One question: can failed hall sensor cause no output to external display? The customer mentioned the screen was flickering before it went black forever.

Okay, yes I did that. I guess it's an iGPU issue.. Could it be anything else?

Yes, red probe on ground. I checked external display and it doesn't output anything here either. As soon as I plug in the charger, the monitor LED indicates a device is connected through HDMI however just a black screen. Chimes and everything still. I also notice that for the internal display...

Okay, With LCD (pulse lasts a split second) R8318 & R8317 OL (or super high resistance) 0.13v to 0v pulse R8380 & R8370 OL 1v to 0v pulse R8361 - 0.5 diode - 3v to 0v pulse R8362 - 0.5 diode - 3v to 0v pulse R8360 - 0.55 - 3v -> 0 pulse Without LCD (pulse lasts 2-3 seconds as compared to with...

Unfortunately, yes I did check with LCD connected. I wish it was that easy lol And yes, 3v split second then 0v.