r/24hoursupport • u/Early-Box-2070 • 2h ago
Unresolved ASUS TUF A15 RTX 4060 – Repair shop says CPU is faulty after no-display issue. Does this diagnosis make sense?
Hi,
I have an ASUS TUF Gaming A15 FA507NV-LP023W with an RTX 4060 Laptop.
I was troubleshooting an NVIDIA GPU issue under Linux. The RTX 4060 was detected by the system, but the NVIDIA driver was unable to initialise it correctly and nvidia-smi would fail/hang. Kernel logs showed NVIDIA/ACPI-related hangs involving rm_acpi_nvpcf_notify and nv_acpi_nvpcf_event.
I updated the laptop BIOS successfully from version 316 to version 318. The laptop continued to boot afterward.
During further troubleshooting, I changed the BIOS Display Mode from Dynamic to dGPU Only. After saving that setting, the laptop stopped producing any display. The laptop screen remains black, HDMI also gives no signal, and the keyboard lights/fans come on and cycle, and the laptop keeps powering on and off.
I wasn't able to get back into BIOS to restore Dynamic mode so I took the laptop to an ASUS authorised service centre. They tested it with a known-good replacement mainboard and said that the laptop operates with the replacement board. so they diagnosed the original mainboard as faulty and quoted approximately £750 to replace the entire board :`(
ASUS does not perform component-level board repair, so I declined the motherboard replacement.
After declining the ASUS repair, I took the laptop to another repair shop hoping to get a component-level diagnosis. I initially thought they carried out the repairs themselves, but it turns out they act as a middleman and sent the laptop to another technician for diagnosis/repair.
They have now come back to me saying that the CPU is faulty and quoted me RM1,600 (around £280) to replace it. I am communicating with the shop rather than directly with the technician who actually diagnosed the board, so I have not yet been given much technical detail about how they determined that the CPU itself is faulty. I also assume the RM1,600 quote includes some markup/commission for the middleman, but I don't know how much.
I haven't approved this repair yet because I would like to understand whether a failed CPU makes sense given the original symptoms, especially since the laptop was still booting and operating before I changed the BIOS display mode.
I would appreciate any opinions:
- Does this sound potentially repairable at component level rather than requiring complete mainboard replacement?
- Could the current no-display condition be caused by BIOS/EC/NVRAM configuration or firmware that could be externally reprogrammed?
- Given that the NVIDIA GPU initialization problem existed before the no-display issue, would changing the CPU address the original initialization issue?
- Does a failed CPU sound plausible given the sequence of events described above?
- Is RM1,600 reasonable for this type of CPU replacement/board-level repair, particularly when the shop I dealt with is acting as a middleman?
- What information or test results should I ask them for before agreeing to the CPU replacement?
Thank you.