Power going in and out [resolved]

[charlie.waid]

Had my crack for a little over a year now. Has recently started losing power. Sometimes I can get lucky by wiggling the input power cable but it does not last long.

Have checked connections, had a couple loose spots, one on the rocker switch and one on the IEC power input brick. Re-did those and it came back on, but not for long.

Speedball has been installed.

Voltage checks below performed with Klein Tools MM325 https://www.kleintools.com/catalog/multimeters/digital-multimeter-manual-ranging-600v-0

While taking the below readings I bumped something and the LEDs all came back on and the readings were in the ranges they should have been...and then they turned off and went back to the below

AC
t7 -> t9: 6.6
t11 -> t12: 179.2
DC
12U -> t1: 234
12U -> t2: 237
12U -> t3: 0
12U -> t4: 236
12U -> t5: 234
12U -> t6: 0
12U -> t7: 0
12U -> t8: 0
12U -> t9: 0
12U -> t10: 0

Can provide pictures or whatever else is needed. Solder connections look good to my untrained eye but please let me know where I should be looking, I am lost.

[Doc B.]

Start by trying a different power cord.

[charlie.waid]

Tried two other power cables I could find around my place, same results

[Paul Birkeland]

You have a loose joint in the amp.  Reheat your solder joints (excluding the power switch and LEDs) and your amp should start working properly.  Pay very, very careful attention to the black wires that run through the amp, as I bet one of those is just not captured by solder.

[charlie.waid]

Reheated every connection that had a black wire through it. Not sure which one was the culprit but power is stable now! Thanks for the tip on where to look!