Have trouble starting your computer? Let me assist you.
Have trouble starting your computer? Let me assist you.
I purchased a new power supply for my PC after buying a 3070ti, which needs two 6+2 Pin PCI-E connectors. My previous PSU was missing its cables from the bag I received in 2014. After turning it off by switching the switch on the PSU and unplugging it, I moved my computer to the kitchen for better workspace. I removed all the cables from the motherboard, installed the new PSU, and connected the cables properly. After confirming everything was secure, I plugged in the power cable and the board lights came on clearly. When I pressed the power button on my PC case, nothing happened—no fan spin or board activation. I double-checked all connections, tried booting using the pin method, but it still didn’t work. I wondered if the COM battery might need resetting, as that could be causing the issue. Any advice would be appreciated. Thanks.
CMOS can become outdated after several years, but they tend to hold up well. I’d replace your DIMMs and clean them with air-dust removal. I dropped a DIMM from my 5900X while it was running hard and almost caused me a panic until I resolved the issue. I also revived an old Lenovo M71e that behaved similarly. Running fans at full speed, no video output—likely a loose RAM slot.
When I power up the PSU, the logo and another LED activate, but pressing the power button on my case doesn’t make a difference—like the fans stay off. I also attempted to use the pins to start it, but it still won’t work.
So when you say logo, you mean integrated into the motherboard and GPU? Not the BIOS splash screen? It does potentially sound like dying capacitors in the PSU. They're known to do that when they're disconnected from power or left turned off for awhile. Are you positive the PWR / RESET header wiring is reinstalled correctly? That can be a nightmare and it is very easy to make a mistake. Edited May 29, 2022 by An0maly_76 Revised, more info
Brand-new doesn't mean anything... Check my message. Are any of the POST LEDs turning on? If not, it might be a faulty MOBO. I'll verify the PWR, RESET, HDD, and LED connections to rule out errors, then take out the ATX power connector to see if the PSU powers up at all. Keep something like an HDD connected, as some won't work without load. If you're still stuck, the PSU capacitors could be failing. They store voltage for startup surges; insufficient storage causes crashes and system failure.
I removed everything from the motherboard near the CPU and AIO, took it out of the case, placed it on a static-safe bag, and connected the power supply, CPU, and fan. I left one stick of RAM in and started the PC. It booted up and worked properly. I suspect a fully seated PCI-E cable in the PSU might have been the issue. Thanks for your help!
There might be some issues with the PSU cables due to a loose connection caused by tight spaces and pressure. If the system starts with just one RAM stick, it could indicate a faulty second stick in the primary slot, which would stop the boot process. Keep an eye on these details if the problem recurs.