acer aspire c24 865 will not power on

fred64

Moved the AIO PC to another location, now it will not power on. When I plug in the power the tiny power indicator (with the power logo) lights up and stays on. If I press the power button for about 15 seconds, the light will turn off. Press the button again it lights up no fans, nothing on the screen (no logo, no backlight etc.) Tried a different power supply — didn't help. PC is at least 5-6 years old, but was working OK.

fred64

I tried connecting an external monitor using the HDMI port. It never even syncs up. I also put my ear next to the air vent. I can hear a fan running. I also tried plugging in a bootable USB. While the power light is on, it lights up solid (not flashing like its trying to read it). When turning the PC on the USB does not seem to try to boot, it just lights up steady too.

I'm thinking, maybe I should try replacing the CMOS battery, I'm sure iots as old as the PC. Any ideas would be helpful.

billsey

Your Aspire C24-865 was released in 2017 IIRC, so the CMOS battery could easily be the culprit. Typical life for those coin cells is around 7 years, and you are right at 8. :)

First step in replacing it is to remove the stand with the monitor face down on a clean surface, maybe with a towel to keep from scratching:

Then there is a single screw:

There might be things in the way, so verify first before removing the metal shield:

And that should give you access to the CMOS battery:

It is likely a standard CR2032, though hard to read in that image. Replace it with a new one, reassemble by reversing the process and give it another try. If it starts at all, drop into the BIOS and do a reset to defaults (F9) and then save and exit (F10).

fred64

SO, I removed the coin cell battery. And, because it has worked on some HP laptops, I held in the power button for 90 seconds. Then replaced it with a new battery.. It did not resolve the problem. I checked the video cable to the screen (reseated both ends). I removed the memory, the SSD drive and the WiFi card. Still powers up with a black screen. I'm thinking its the video controller, since the HDMI port does not work either. Unless someone has some other suggestion. I'm really on the fence about replacing the MOBO… If it does not work its $$ down the drain.

billsey

Yes, if the issue is in the MB you are likely past the point of no return, cost wise. AIOs don't use standard motherboards, their designs are more like laptops so have custom sizes and shapes. The onboard video is a different circuit from the chipset than the HDMI, so a display failure would still leave the HDMI port working. That points more toward the motherboard itself…