My gaming PC was working normally until I replaced the memory. The system uses an ASUS PRIME B760M-A AX DDR5 motherboard, an Intel i7-14700F, an RTX 4060 Ti, and Windows 11. The original memory was TeamGroup T-Force Vulcan DDR5. I installed a 2x16GB Lexar DDR5-6000 kit rated at CL38 and 1.35V. Since the change, the computer powers on with fans, lighting, and GPU fans running, but the monitor shows no signal and I never see the manufacturer logo or BIOS screen. I removed the Lexar kit and reinstalled the previously working T-Force stick, but the display still does not return. I'm looking for troubleshooting steps to get the system to POST again.
3 Answers
Reseat the hardware carefully, especially the RAM and graphics card. Test with one original memory stick at a time in the motherboard’s preferred single-stick slot, making sure both latches fully lock. Also check that the GPU is fully seated and its power connector is secure. The i7-14700F does not have integrated graphics, so the monitor must remain connected to the RTX 4060 Ti; removing the GPU cannot provide onboard video with this processor.
Try a complete CMOS reset rather than only switching the memory. Shut the system down, unplug the power supply, remove the CMOS battery for around 10–15 minutes, and use the clear-RTC pins if the board provides them. Then install only one RAM stick in the recommended slot and give the first boot several minutes, since DDR5 memory training can take longer after a reset.
A full power discharge is worth trying after swapping memory. Turn the PC off, disconnect every power cable, hold the case power button for several seconds, remove the RAM, and briefly power the system on without memory before shutting it down again. Reconnect power, install one known-good stick, and try booting. If there is still no POST, check the motherboard’s diagnostic LEDs and consider BIOS recovery or inspecting for a disturbed CPU/socket connection.
I tried the clear-RTC pins, but it didn’t change anything.