Question My PC starts up but occasionally fails to function
Question My PC starts up but occasionally fails to function
My PC occasionally posts and sometimes doesn't, even though everything is powered on and fans are running. This happened after installing Lian Li Strimer V2 Plus for my GPU. Before that, it always posted and started without issues with just a single beep. With the 24-pin Strimer cable, it worked fine until I added the 8-pin version. Since then, it has failed to boot sometimes, requiring me to open the case and force the 8-pin PCIE connection. After several attempts, I managed to get a post again, but the single beep is gone. If it doesn't post, the monitor shows no signal. I tried reseating RAM, cleaning contact pins, resetting CMOS, using a newer PSU and PCIE cable, switching to another GPU plus monitor, and even unplugging the Strimer cables without any extension—still nothing worked. A repair shop diagnosed it as a faulty HDD, which I replaced with a new one. It has booted without issues now. However, a few days later the same problem reappeared. It seems unrelated to the HDD; my PC booted fine before the cable change. The issue appears to be with the cold boot. It might take about 4 to 5 tries to get a post without the beep. Could the Lian Li Strimer cables have damaged the motherboard or affected the PSU?
When sharing a troubleshooting thread, it's standard to provide complete system details. List the specifications as follows:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
Include the PSU age along with its make and model.
BIOS version for your motherboard at this time.
CPU model is Ryzen 7 5700X with Alseye M-M120D cooler.
Motherboard is ASUS TUF Gaming B550M-E WIFI.
Memory includes 4 x 8 GB Corsair Dominator DDR4 at 3200mhz.
Storage options are SK Hynix P41 Platinum 2 TB and Gigabyte Aorus Gen4 7000s 1 TB.
Graphics card is Gigabyte AERO RTX 4060 OC with 8GB RAM.
Power supply unit is Seasonic Focus GX-750W (2 years).
Chassis used is Coolermaster TD300 Mesh.
Operating system is Windows 11 Pro.
Display is MSI G2412.
BIOS version installed is 3402.
The silence isn't from the main speaker, but a broken wire from the internal mobo. I purchased several from Aliexpress and it starts beeping again. Still can't pinpoint the exact issue causing the boot failure. It sometimes boots up, other times not, especially during cold restarts. To get a boot, I need to turn it on and off 8-10 times. Once it works, I can restart and shut down the PC quickly, but it shouldn’t stay on for more than an hour. When it fails to boot, it shows a single beep—everything seems normal except no signal to the monitor or a black screen. I’m wondering if a broken PCIE slot retaining clip is the cause, even though the clip feels tight now. Maybe a loose connection from that could be the reason. I also tried a cheap GPU anti sag support to see if it helps, but that didn’t resolve the problem. The PSU voltage readings are fine, and unplugging the Lian Li strimer didn’t fix it either, even with an extra monitor. It’s been two months of troubleshooting, which has been frustrating and wasted my money on repairs and a new SSD with no results.
1070 GTX. The 4060RTX was functioning properly before I added the lian li strimer. It seems the strimer might have damaged the PSU or GPU? I didn't connect it straight to the PSU. Even when using the previous working 1070 GTX, the screen still displayed black.