from service guide 8595E the troubleshooting guide says follow WRUP +5v signal on pin 54 but found it on pin 55 of J1
but its ok for other models ..very confused
4. Verify the High-Power-Up signal from the A8 power supply by
checking for the +5 V TTL WRUP signal at pin 54 on the A16J1. The
A16J1 connector is on the trace side of the A16 processor/video
Note that if your analyzer is an
8590 E-Series, 8591C, or 8594Q
QAM analyzer, the WRUP signal can be measured on pin 55 of
each card-cage slot on the A15 motherboard. Refer to Figure 4-6
for the numbering order of the connector pins on A15J3 through
A15J6