jeff-jordan

Hiya,

thank you for this thread guys !

Last night I had the same problem here with my VU+ Duo.

It first "behaved" curious and rebooted in a loop over a time of approximately 15 minutes.

Then I turned the box off and waited several minutes.

After that, the box didn't start up anymore and the only sign of life was the red LED when powering up.

I immediately had the power supply under suspicion, because with now ~4 years of operation, the capacitors should be overdue.

A quick check with the multimeter at the supply voltages showed me that at least all voltages were there (so no diodes or zener-diodes should have been defective)... but instead of rigging up my old Tectronix to check the ripple, I went to bed then.

So this morning I've been looking at several forums, if the problem is already known, and found this thread ;-).

After changing C807 on the STB-board (replaced it with 470uF/16V), I took a closer look at the power supply pcb, where I additionally changed C14, C15 (replaced both with 2200uF/10V/105°) and C17 (took another 470uF/16V/105°).

Now there's nearly no ripple at the +5V Vcc... and, of course, the box works again.

Best,

jeff