The standby light is blinking and the system is not functioning. Can you help?

Unplug unit from AC power outlet for 5 minutes, plug it again and check.
Need further help, let me know.

I have two SONY DAV-S880's, and both have had the same power supply problem, where the standby red LED blinks indefinitely.

The power supply in the Sony DAV-S880 is shared by several other models, including the DAV-C770.
I read a blog post about repairing the C770 power supply for the same issue (google dav-c770repair, first link that comes up), which points out the C914 capacitor as the common fault.

I decided to try it out, and bought a couple of "RND 150ENR470M35B - Aluminium Electrolytic Capacitor Radial 47 uF 35 VDC" capacitors.

The power supply itself is easily removed, but you need to take care with the current stored in the large capacitors even when removed for a while. Use a 60W light bulb or larger, and a lamp or socket that you can hook up to a wire, and connect the leads to the capacitor solders on the backside to discharge the current. For me the large C912 450V cap really made a flash, so be extra careful to short ALL capacitors.

Google "service manual" and "DAV-S880" or other models to get the manual with excellent schematics and PCB drawings. The PSU board itself is also very well marked with all capacitor names (except the C914 cap which is not marked for some reason. Use the drawing to find it).


After removing the C914 cap with a normal solder iron, I checked it with a multimeter for resistance and keeping charge. Both seemed to behave normally, but when measuring with an LCR meter, the capacitance value showed 1 where it measured 0.05 on the replacement caps.


I soldered in the new capacitor, and now the first DAV-S880 works as normal.

I'll do the same repair on system nr. 2 soon, and will post an update on that one as well.