i recently cleaned my mbp m4 with ethanol alcohol 80 percent i think then i left it dry for 30 minutes then when i turn the machine back on the spacebar is weird

I’m trying to revive an Early 2013 MacBook Pro (15" Retina, i7/16GB/512GB). It previously had power issues, and a 2015 battery was forced into it (not by me). The machine worked for a bit, but now it’s completely dead.

Current situation:

• No battery installed at all
• MagSafe LED is amber, not green
• No chime, no fan twitch, no display
• SMC reset does nothing
• Battery connector pins look normal
• Power button does nothing
• I’m trying to make the Mac boot, even once, to recover data, NOT buy an adapter or external enclosure

I know amber with no battery means the battery sense line might be stuck low. I’m looking for actual repair advice, not “just buy an adapter.”

I just want my dad to get his MacBook back and he really doesn't care about it being portable. As a last resort I'm willing to buy a battery but I wanted to know If there was a real fix.

Board: MacBook Pro 13" M1, A2338, 820-02020 (no donor board available, all other parts duplicated)

History

• Board was fully working on the bench (booted, 20V negotiated) while I swapped it into a donor chassis.
• During final assembly I screwed the USB-C bracket down without the USB-C flex being connected. After noticing and connecting it properly: stuck at 5V.
• Replaced port flex/port board with donor parts → bare board briefly negotiated 20.52V / 0.089A. After reconnecting battery + BMS cable it dropped back to 5V and has stayed there since, even without battery.
• With battery A connected it occasionally negotiated 20V / 0.8A. Pressing the power button then made the USB-C meter reset and fall back to 5V.

Current state (USB-C meter)

• No battery: 5.1V, 0.135A → drops to 0.03A
• Battery A: constant 5V / 0.4A
• Battery B: dead or in protection (1.5V on PPBUS with only B connected)
• Same behaviour on both ports, with original and donor port flexes

Voltages (charger only, no battery unless noted)

• PPBUS_AON: 12.3V (CC340) without battery, 11.9V with battery A
• PP3V8_AON 3.8V | PP5V_S2 5.0V | PP3V3_S2 3.3V | PP1V8_S2 1.8V | PP1V25_S2 1.25V
• PP3V3_UPC0_LDO / UPC1: 3.3V / 3.3V | PP1V5_UPC0_LDO_CORE / UPC1: 1.5V / 1.5V
• PP1V8_AON_MPMU 1.8V | PP1V5_VLDOINT_MPMU 1.5V | MPMU_VREF 1.0V (C8204)
• PMU_ONOFF_L (R8324): ~1.8V, goes to 0V when the button is pressed → button OK

Diode mode (red on rail, black GND, cheap 3½-digit meter, values in V)

• PP1V8_AWAKE 0.163 (rising) | PP1V25_AWAKE_IO 0.733 | PP1V25_AWAKESW_VCCQ 1.896
• PP1V2_AWAKE_PLL rising to OL | PP2V5_AWAKE_NAND ~1.0 rising | PP0V88_AWAKESW_NAND 0.8
• PP0V88_S1 0.8 rising | PP0V805_S1_VDD_FIXED 0.5 | PP0V764_S1_SRAM 0.52
• PP0V6_S1_VDDQL 0.362 rising | PP1V06_S2SW_DRAM 0.06 | PPVDD_CPU_SRAM_AWAKE 0.82
• PPVDD_DISP_S1 0.080 | PPVDD_DCS_S1 0.53 | PPVDD_ECPU_AWAKE 0.08
• PPVDD_SOC_S1 0.029 | PPVDD_PCPU_AWAKE 0.03 | PPVDD_GPU_AWAKE 0.026

Comparison at the test points (diode / reversed probes / ohms):

• TPU6B6 DISP: 0.080 / 0.185 / 64Ω
• TPU6B2 ECPU: 0.081 / 0.079 / 73Ω
• TPU6B5 SOC: 0.028 / 0.034 / 20Ω
• TPU6B7 DCS: 0.53 / 0.303 / OL

→ I don’t see a hard short anywhere. DISP looks similar to ECPU.

DFU attempts

• Windows host with restorekit, known-good data cable, DFU port (left, closest to hinge)
• Manual DFU: power + L-Ctrl + L-Option + R-Shift, and “hold power while plugging in”
• Tried with and without battery, with the charger in the second port
• No USB enumeration at all (no Windows connect sound, nothing in Device Manager)
• JF600 and port flex look fine under the microscope

Questions

1. With all S2 rails and the UPC LDOs present but stuck at 5V and no DFU enumeration: what are the usual suspects on 820-02020?
2. Does anyone have reference diode values for PPVDD_DISP_S1 / ECPU / SOC on this board?
3. Is it worth trying DFU from an Apple Silicon host (restorekit dfu / Configurator), or does the missing enumeration on Windows already point to hardware?

Thanks!

Something got jammed in the back of this MacBook and damaged the ribbon cable. Trying to identify what the cable is for before continuing. The display is not coming on any longer but I went through the iFixit teardowns and it looks like the display might be a different cable. Just wanting to double check. Thanks for the help! This is a MacBook Air (M1, 2020)

Accidentally spilled coffee on MacBook. It kept running okay so I left it on. A few minutes later the screen started to flicker. I left for 5 mins and now it will not turn on. The keyboard still lights up but the screen isn’t. When I blew on keys it flickered back on briefly. Right now I have it folded like a tent. What should my next steps be to bring it back to life? Please help

My friend dropped my MacBook Air M1 on a straight surface, i told him to hold my slevve bag, i put my mac in it, and he justs drop the entire sleeve w my mac inside, well the sleeve kinda helped not cracking or damaging the display itself and only got a dent but still not an expert in this so can you guys tell me what should i do? Or is this fine?

If its fine, will it cause any issues in future? Or should i do something about it?