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My MacBook pro charges fine. all voltages look ok with exception that I am measuring 1.78v where the schematic shows 1.85V on PPVCC. is that too low to work?
It powers up for approximately 10sec then shuts off. Repeatable responding to the power button.
I have tried everything i could find on searches.
The only thing left perhaps is those three mosfets that provide that voltage.
Is that what i should try next or does someone have a brilliant idea for me ...

Hello all,

Samsung 65" TV that randomly power cycles. It could be a few hours or a few minutes and then I hear a click sound and reboots. I have updated the firmware to the latest. I'm suspecting the power supply might have bad caps (hoping 🙏...). Inspected the PSU board and none of the caps have any bulging, leaking, or unusual noises that I can hear. Any suggestions? Thanks

PSU: L65X1Q_DHS / BN44-00627A
Model: UE65F6400AFXZA
Ver No: MH01...

Hello.

Yesterday my mother encountered a problem with her laptop, which led to it not turning on and expressing the behaviour mentioned in the title (you press the power button and then it turns off after a minute)

Here is what happened:
At one point i was fixing a setting on the laptop to make the laptop properly recognize the NVMe drive i put in months ago. All worked until all of a sudden the computer blue screened. The screen said it would reboot, but it never did. So she held down the power button, powering it off. Pressing it again, the screen briefly turned...

I have two of these soundbars, both with the exact same issue. The soundbars were hit by lightning and no longer power on. The PSU does not output any voltage on the DC side. When plugged into mains, the DC output is a stone-cold 0.0 volts. The AC side of the PSU seems to be functioning correctly (as far as I can tell). When checking the plugged-in PSU with my thermal camera, the OB5269CP PWM controller (U1) and the two resistors (R12 and R13) pulse on and off. These run to the positive DC side of the bridge rectifier (among other components along the way).

There's no physical damage...

Hi everyone,

I’m working on a Denon AVR-X4000 that goes into protection mode (fast red blinking LED) shortly after the second relay click.

According to the service manual, a fast red blinking LED indicates a DC detection (DC_DET) or ASO (abnormal current) fault, meaning the unit is detecting a potentially dangerous condition on the power amp or power supply side.

Here’s what I’ve done so far:

• Fully opened and cleaned the unit (a lot of dust inside)
• Removed and visually inspected the AMP board → nothing visibly damaged or burned
• Testing is done with

...

HISENSE 65H6510G (13 AUGUST 2020)

When powered on, initial splash screen (HISENSE ANDROID TV) displays for a few seconds then power shuts off. Tried updating firmware with USB flash drive (can't find 4GB drive but did format larger drive in FAT32) with no luck. Flash drive would be accessed but would never get to the update process. I have ordered a board (RSAG7.820.7911/ROH, PART# 242585) from eBay which will arrive in a few days. Does anyone have any input of whether I am chasing down the right trail or should I be trying something else? I appreciate your time and wish to say thank...