Strong SRT5300 fails with no bulging electrolytics

[japlytic]

In a Strong SRT5300, I found that when the unit is turned on, all of the segments on the front display are stuck on.
Measuring the power supply rails shown that the +3.3V rail was low, along with the +5V rail a bit too high .
Replacing all of the electrolytic capacitors except the 400V unit fixed the problem and has shown that no damage was caused by a high +5V rail.

The electrolytics on the power supply board were mainly Samyoung SHL and KME Series units, which were unsuitable for switching power supply service .

[stj]

Re: Strong SRT5300 fails with no bulging electrolytics

that's standard crap, i used to fix hundreds of sat boxes.
i never checked them first, just replaced all the caps and 99.9% of them started up and never failed again.
the few times it still wasnt right, the ripple had corrupted the flash - a reflash of the firmware & they also never came back.