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Client had repaired liquid damage in some other shop. They replaced battery and on the board I can see liquid damage around: UB600, J5260, QV300, UB300 When on battery there are random restarts with kernel panic. "*** Panic Report *** panic(cpu 0 caller 0xffffff801f342836): nvme...

Please correct me if doing something wrong.

No DFU mode with battery and charger. The same without battery and charger.

Soldered wire with SE032/3 and 4. No DFU mode with battery and charger. The same without battery and charger. PP1V8_SLPS2R 1.8V PP1V1_SLPS2R 1.1V PP0V8_SLPS2R 0.79V PP1V8_AWAKE 1.79V PP3V3_AWAKE 3.23V PPVDDCPUSRAM_AWAKE 0.79V PP1V2_AWAKE 1.19V PPVDDCPU_AWAKE 0.75V

"Try to enter DFU using SE032 pads." no luck "Did you test the board alone on the desk?" yes, got 5V and 0.26A on charger and every a few seconds meter turns off and turn on (cycles). U3900 and U6903 gets warm.

I can but only when battery connected and when will do "jump start" when connect charger.

"Replaced that CD3217 and still got the same issue." When battery is disconnected got 5V and 0.25A on charger on both ports. With battery connected 5V and 0A on one port and no reaction on USB C volt meter on another port.

Replaced that CD3217 and still got the same issue. USBC meter shows all diode mode values are correct. Any idea?

When battery is disconnected got 5V and 0.25A on charger on both ports. With battery connected it turns on but on login screen trackpad/keyboard is not working. Fan on high RPM and 5V and 0.0A on charger on one port. Second USB C port got not reaction on USB C volt meter - it is linked with...

"Do you get headphones sound?" Yes

There was small liquid damage on UR660. Replaced that and still no sound. IC is getting hot under thermal camera. Don't have access to know working board. Values around UR660: PPBUS_AON_SPKRAMP_ABC_ISNS 11.96V PP3V8_AON 3.79V PP1V8_AWAKE 1.79V PP1V2_AWAKE 1.22V CR668/1 3.48V RR662/1 0V...

There was connection between C3717/2 and J3700/22 so it was strange why there is no any value when SSD is inserted. Checked inside of J3700 and pin 22 was bented/damaged. J3700 replaced and all works fine again. Many thank for all help.

Found something wrong. One of C3710-17 dont match. With SSD inserted on working board got diode mode reading 0.380 and on clients board got OL. My 820-00138 boardview is in fact 820-3662 model and that area looks different . Will show on photo below where got wrong reading. It looks like it...

Short to ground (0.5 ohm to ground) when SSD connected.

Sorry, thats diode mode readings

R3740 is good J3700/24 - the same values on known working board: w/o SSD - 0.456V w/ SSD - 0.386V J3700/7 - the same values on known working board: w/o SSD - 0.290V w/ SSD - 0.290V J3700/8 - the same values on known working board: w/o SSD - 0.440V w/ SSD - 0.387V J3700/47 - the same values...

Signals as well. U3740/1 - 3.41V U3740/2 - 0.99V U3740/3 - 3.32V U3740/4 - 3.41V U3740/6 - 3.32V U3740/7 - 0.0V U3740/8 - 0.0V

Cant find any corossion. Board won't boot when PCIE SSD is connected (SSD controlled on SSD is hot). After press power button fans are spinning (trackpad clicks, caps lock LED not working) and screen is blank. As soon SSD is removed all works fine if boot from USB port. Tested with known good...

U8640 is not in place. Fitted rest of components, lifted R8642 and still got 0.014V in diode mode on SSD_BOOT_L Any other idea?

Voltage on J8600/ 1 and 56 is correct. Found low diode more reading on SSD_BOOT_L = 0.014V (should be around 0.780V). Removed all caps on that line C8675-77 and still low value. Then removed R1442 and on pad 2 still low value so fault in PCH?