Search results

"When instal system in dfu trackpad is working" What this means?

Check all feedback resistors RC709-13. Be sure to have good solders and traces.

I can't discard U2010 firmware issue. You had one audio amplifier damaged; that is connected to CPU.

https://openboarddata.org/?a=showboardsolutions&bpath=laptops/apple/820-01598 Try replacing U7800...

Possibly NAND failure...

Dead chips connected directly to CPU could affected it...

You may have a problem with PCH, CPU, or GPU...

Check diode mode on its surrounding coils; compare with good board. You may need to replace it.

You may need another M1 (or newer) MacBook for DFU Blaster. Try external switch method instead: https://logi.wiki/index.php/DFU_Mode_Restore_(Macs)#DFU_Mode_using_external_switch

Then why replaced U5200??? What is the exact ohm resistance to ground? Compare with the readings on all secondary coils.

Replace U8500. First, be sure no short, or low resistance at 5V_S0SW_LCD.

Did you connect charged battery and 96/140W charger for DFU?

Check resistance (ohm scale) over C5220/60.

Injecting 4V will cause 200mA aprox; not enough to heat anything on the board. A good thermal camera may point you to some small thermal signatures. You may need to wait some time; remove CPU heatsink first.

First of all, welcome to the forum! The special keys used by DFU are controlled by hardware (UT103) to generate RSLOC_RST_L signal. If you can't access recovery menu, or boot menu, then keyboard doesn't really work. Just in case, check if you have more luck with DFU Blaster.

Check again the voltages mentioned in the previous posts.

Remove F5200 and check which side the short remains.

"PP3V3_G3H - 23.7 Ohms to ground" Check it 20s after power is removed (charger and battery). If still low, something is damaged there.

Any history fault available? CPU core voltage should drop to 0.65V aprox, when board boots.

These readings should have very similar value. Possibly damaged U9850...