Outofwhack
Member
No evidence of corrosion.
Stuck at 5v, fan runs a while
U3200 CD3215 had open loop D+/D-, replaced, now getting to 20v
Still no logo display.
pp5v_g3s had low diode mode. 5volts injected. C7675 getting hot so removed. DM on pp5v_g3s still .09v
Removed pp5v_g3s inductor, problem downstream of inductor.
Removed all caps downstream and could not find cause of low diode mode .09
Voltages
------------
ppbus steady 12.6v
ppvbat_g3h_conn 12.6v with occasional (5% duty) drop to 0.15v (no bat connected)
5v pp5v_g3s
3.3v pp3v3_g3h
1.2v pp1v2_s3
0v all vcore phases
2.5v 2v7_nand
Checks
----------
vcore mosfets all supplied with 12.6v
0v cpucore_fccm/zcd_en
1.8v all_sys_pwrgd
1.8v cpuvr_pwrgd
Out of steam. Any thoughts?
Stuck at 5v, fan runs a while
U3200 CD3215 had open loop D+/D-, replaced, now getting to 20v
Still no logo display.
pp5v_g3s had low diode mode. 5volts injected. C7675 getting hot so removed. DM on pp5v_g3s still .09v
Removed pp5v_g3s inductor, problem downstream of inductor.
Removed all caps downstream and could not find cause of low diode mode .09
Voltages
------------
ppbus steady 12.6v
ppvbat_g3h_conn 12.6v with occasional (5% duty) drop to 0.15v (no bat connected)
5v pp5v_g3s
3.3v pp3v3_g3h
1.2v pp1v2_s3
0v all vcore phases
2.5v 2v7_nand
Checks
----------
vcore mosfets all supplied with 12.6v
0v cpucore_fccm/zcd_en
1.8v all_sys_pwrgd
1.8v cpuvr_pwrgd
Out of steam. Any thoughts?