We had a client bring in a Cyberhome DVD recorder model CH-DVR 500. Problem was it would not "boot up" the system and stayed on the startup screen. We found there was a bad cap in the power supply that was bulging and hot. It is a G. Luxon 3300 mfd 6.3 volt in the middle of the board. We installed a terminal strip on the main chassis with a new 3300 mfd 10 volt cap and sure enough this fixed it.
This unit was only one year old so if you have one or have a client bring one in for repair beware of those caps.
Was reading a website I think its
www.badcaps.com about bad new caps on computer mother boards so that is what also led me to suspect bad caps in this case.
Here are pictures of the repair: