I built a custom PC following the manuals instructions and it worked. After some months, sometimes the PC didn't turn on when I pressed the power button. Then I tried again and again and the PC started. Currently it is very difficult to boot my PC and I chose don't turn it off and it stays on. But this is not a solution for me and I need to know what is wrong to fix. I want to turn off my computer and turn it on later when I press the power button.
Nowadays, when I switch on the PSU the ROG LED light on the I/O shield of the motherboard turns on. The Q LEDs (CPU, DRAM, VGA, BOOT) don't light on, meaning that these components are OK. But, when I press the power button, nothing happens. The computer doesn't start, even using a paperclip in pins of the motherboard.
There isn't a reproducible way to turn on the PC. Sometimes I wait some hours and press the power button. Other times I need to get off the battery and put it on again. And others I remove and put again a video card or other parts. When I can turn on the PC, almost all the times the BIOS date/time is wrong.
My hypothesis is that the motherboard has some problem with the battery or CMOS.
Tests that was made
Why does my PC sometimes doesn't start?
Why is the BIOS's date/time wrong after a long period of time (1 or 2 days) turned off if the battery is new?
PC specs
MOTHERBOARD
Nowadays, when I switch on the PSU the ROG LED light on the I/O shield of the motherboard turns on. The Q LEDs (CPU, DRAM, VGA, BOOT) don't light on, meaning that these components are OK. But, when I press the power button, nothing happens. The computer doesn't start, even using a paperclip in pins of the motherboard.
There isn't a reproducible way to turn on the PC. Sometimes I wait some hours and press the power button. Other times I need to get off the battery and put it on again. And others I remove and put again a video card or other parts. When I can turn on the PC, almost all the times the BIOS date/time is wrong.
My hypothesis is that the motherboard has some problem with the battery or CMOS.
Tests that was made
- I took the PC to technical assistance and they checked all parts and each component (PSU, cables, motherboard, CPU, memory, SSD, battery, fans and others) are fine.
- I disassembled and assembled all computer 2x
- I replaced CMOS battery 2x to new one
- I used a multimeter to check battery, cables, PSU and socket power from wall
- I replaced the metal screws to plastic screws to attach the motherboard in the case
- I cleared CMOS
- I replaced the power button
- I used a screwdriver to turn on direct on pins of motherboard
- I followed many checklist to test and to assembly the computer
- I read dozens of posts about problems like mine
- I set APM on BIOS to automatic start PC at 7:30 AM (its works sometimes)
Why does my PC sometimes doesn't start?
Why is the BIOS's date/time wrong after a long period of time (1 or 2 days) turned off if the battery is new?
PC specs
MOTHERBOARD
ROG STRIX B450-F GAMING (Rev 1.xx)
Chipset: AMD Ryzen SOC (Rev. 00)
Southbridge: ADM B450 (Rev. 51)
LPCIO: ITE IT8665
BIOSBrand: American Megatrends Inc.
Version: 3103 - AMD AGESA Combo-AM4 1.0.0.6
Date: 06/17/2020
CPUAMD Ryzen 5 2600
MEMORY16GB (2x8GB) Corsair Vengeance
VIDEO CARDName: Radeon RX 580
Revision: E7
Memory: 8 GB
Type: GDDR5
PSUCorsair CX750
Disks2x Corsair Force Series MP510 480GB NVMe PCIe Gen3 x4 M.2 SSD (connected with RAID-0)
1x SSD Kingston 120GB