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Got this unit in, no signs of liquid damage, however one of the WIFI antennas was allowed to get in between the bottom case panel and the JTAG connector and visibly crushed the connector. I have removed the villainous JTAG and have noticed that over time to the CPU gets warm and almost to...

Is it worth attempting to reflow the CPU / RAM chips with flux?

This board is a potential refurb for a business client. The only history I have on it is that the screen is cracked and that there is "No Display". Upon further investigating the unit gets a green light and fan spin but does not POST. The computer spins up runs for about 30 seconds and then...

PPBUS stays stable with or without green light, as does PP3V42. It does not power on with a charged battery.

Yup the light cycles with several known good DC In Boards, and with 60W / 80W / and Magsafe 1 cable connected to DC Power Supply

Have an A1466 that doesn't come out of sleep when on battery alone, at least more frequently than on charger as well--have not observed it while on charger. Reballed the SMC. Passes ASD OS with no issues. When the unit tries to come out of sleep, it just hangs with a black screen and active...

Tried a second charger and DC in board. PPBUS is 12.57v

I suspect this unit is the victim of a cheap Chinese charger, bad dorm room wiring, etc. Came in with no green light / no power. R7051 was blown, replaced the resistor and ISL. Got green light back, however after a few seconds it cuts off, and then a few seconds letter will come back on...

J9000 Pin 4: OL Pin 6: 0.593v Pin 7: 0.590v I replaced the LVDS connector and am using a different test display.

LCD_IG_PWR_EN is 0v, Its looking like the PCH is around every corner! Arghh.

Im no longer getting video, looks like I need to check the LVDS area some more!

The 3v its being drawn at almost no amperage only 0.001 or 0.002 A.

I injected 3 volts into pad 2 of where R9704 was and am still getting no backlight. Should I be looking at the LVDS for not telling the computer theres an LCD present or is it more likely a problem with the LED backlight driver not getting another rail it needs to be doing its job?

Resistance to GND on BKL_PWM @ C9704 is 2.285M Ohms

The clock chip was replaced and the computer now POSTs and loads the OS. The backlight circuit which was hit the hardest with the corrosion is know a problem. The LVDS was replaced due to it missing legs. The LED backlight drive has been replaced as well as all the surrounding resistors (nasty...

CPUIMVP_VR_ON: 3.293v Resistance R7402: 91 K Ohms Pin 1: 0.509v Pin2: 12.58v

The board has a history of water damage showed up very corroded in the top edge of the board. The backlight circuit was hit the hardest. After cleaning the board gets a green light and fan spin however there is no chime, RAM beeps, or light on USB mouse. The CPU gets slightly warm after being...

Was definitely Q7130, thanks a ton. Replaced those resisters as well, they were only slightly out of spec. but at this point it's more worth while to be sure.

Thanks, I'll check those out when I get in tomorrow. Much appreciated.

[SOLVED]820-3476 PPBUS_G3H 14v. Have charger green, orange light, fan spin, and chime. I have an 820-3476 with an unusually high PPBUS_G3H at 14 volts. I've checked R7121 and R7122, both are fine. Before I started having trouble with PPBUS_G3H I had a blown U7700 that I replaced. Upon turning...