My parents' HP All-in-One PC (model 22-dd0153w, product ID 7Z6V8AA#ABA) runs Windows 11 and suddenly stopped powering on after a brief brownout that caused the lights to flicker. It was connected to a surge protector at the time. The white indicator on the back lights up when the power cord is connected, but pressing the power button does nothing. Holding the button for about 10 seconds causes a small white light near the lower-right speaker area to turn on, but it goes out as soon as the button is released and the computer never starts. There is no visible screen image or sign that only the backlight has failed. I have tried a hard reset several times, with and without USB devices connected, and have tested both the surge protector and a wall outlet. I don't currently have the tools to open the machine and would like to know what else I can safely test before taking it to a repair shop.
2 Answers
If the computer is several years old and the files are important, a local independent repair shop may be a better option than a large retail service desk. Ask them to diagnose the power fault and preserve or copy the data before replacing anything. If repair costs approach the price of a replacement PC, it may be more practical to replace the computer and have the shop transfer the files from the old drive.
The rear light only confirms that standby power is reaching the machine; it doesn’t prove that the internal power supply or motherboard is working. Since this happened immediately after a brownout, a failed internal power supply is a reasonable possibility, although the motherboard could also have been damaged. Look up a disassembly guide for this exact model, then inspect for burnt areas, bulging capacitors, or disconnected cables. Replacing the internal power supply may fix it, but it would be a guess without testing the components first.
That makes sense. I’ll look for the service information for this model and avoid opening it until I can do so safely.
If you do replace it, make sure the shop confirms whether the old drive is healthy and backs up the data before disposing of or recycling the machine.