AMD RADEON RX 7900 XTX Gpu Rx 7900 Xtx No Post
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
86%
CONF
|
DrMOS Power Stage (Infineon TDA21490)
The RX 7900 XTX utilizes a multi-phase VRM to handle high transient currents. A failure in a DrMOS power stage often results in a hard short-to-ground on the 12V input rail. This prevents the motherboard from completing the POST sequence because the PSU detects a short and immediately shuts down power to the PCIe slot and EPS cables.
SKU: TDA21490
|
|
|
9%
CONF
|
Digital Multi-Phase PWM Controller
This integrated circuit manages the voltage regulation for the Navi 31 GPU core. If the controller fails, it cannot sequence the power rails (Vcore, VDD_MEM, VDD_SOC) in the correct order or at the correct voltage levels. Without a 'Power Good' signal from this chip, the system BIOS will fail to recognize the GPU, resulting in a 'No Post' or VGA debug LED.
SKU: XDPE132G5D
|
|
|
5%
CONF
|
SPI Flash BIOS IC
The GPU BIOS contains the firmware necessary for the motherboard's UEFI to communicate with the card. Corruption in the SPI Flash chip, either through electronic interference or a failed firmware update, prevents the GPU from initializing its internal logic, causing the motherboard to hang during the VGA initialization phase of the POST.
SKU: W25Q128JW
|
DIY Repair Guide
Watch exactly how to replace the DrMOS Power Stage (Infineon TDA21490).
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.