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.

This error has a different meaning on the Original Xbox 360 vs the Xbox 360 S and Xbox 360 E.

Original

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
  • Lift at least 1 pin of the inductors to isolate sections before checking
  • 2 phases
• Check V_GPUCORE decoupling capacitors near and under GPU
• If all components are fine but the short remains, replace the GPU

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 pullup and switcher
  • If components are fine but signal is missing, replace Southbridge
• Check VREG_GPU_PWRGD
  • If present, replace Southbridge
  • If missing, check pullup
    • If pullup is fine, continue below

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

S and E

ERROR_V_3P3

VREG_V3P3_PWRGD is driven high by the V_3P3 controller as long as the rail is within tolerance. If V_3P3 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_3P3 is shorted
• If it is, check circuit components to localize short
  • Lift at least 1 pin of the inductor to isolate the rail before checking

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_V3P3_EN signal and pulldown
  • If pulldown is fine but signal is missing, replace Southbridge
• Check VREG_V3P3_PWRGD
  • If present, replace Southbridge
  • If missing, check pullup
    • If pullup is fine, continue below

VREG Circuit

• Everything in this section must be checked quickly, as the SMC will shut down power upon entering EC_FATAL
• Check if V_3P3 voltage is within tolerance
• If it is, replace the PWM driver and recheck PWRGD
• If it isn't, check VREG and PWM driver