Repair Actions/0003

See also: Errors and Secondary Error Codes

Note  This page is a technician's reference and is not intended to teach diagnosis and repair of electronic circuits.

Original Xbox 360

ERROR_V_GPUCORE

VREG_GPU_PWRGD is driven high by the V_GPUCORE controller as long as the rail is within tolerance. If V_GPUCORE ever drops out of tolerance, the signal is de-asserted, causing the SMC to enter EC_FATAL and the 0003 code to be displayed on the front panel.

Short Circuit

• Check if V_GPUCORE is shorted
• If it is, check each phase to localize short
  • 2 phases
• Check V_GPUCORE decoupling capacitors near and under GPU
• If all components are fine but the short remains, replace the GPU

VREG Enable and Power Good

• Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL
• Check VREG_GPU_EN_N signal components
  • If components are fine but the signal is missing, replace Southbridge
• Check VREG_GPU_PWRGD
  • If present, replace Southbridge
  • If missing, check pullup

VREG Circuit

• Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL
• Check if V_GPUCORE voltage is within tolerance
• If it is, replace the PWM driver and recheck PWRGD
• If it isn't, check each VREG phase and PWM driver
  • 2 phases