Oh thank you! Long story short my problem is fixed by this too.
My Linux Media Center PC (XBMC/MythTV) has always had this problem. You can turn it on and it works, but about 15 minutes after that, the HDMI would start dropping out more and more frequently until it would eventually turn off completely. If you let it warm up for an additional 15-30 minutes it would work fine for the rest of the night. It worked no problem with the cable box so I never thought I'd be able to get a warranty claim on it. Well fast forward to Monday when I hooked up my new Roku 2 XD. Guess what? After 15 minutes it does the same thing.
The voltage regulator on the top was a 480xx toshiba so first I just replaced that with a Nichicon 100uF 10V
capacitor I had from another project, and a AVX 1uF 50V MLC
. It still dropped out around the 20 minute mark so I did the 4 on the other side (which were not toshiba brand) too. Working fine after an hour now!
A few notes about the 1uF caps:
-- Prepare the tab you're soldering to by scraping off any oxidation and schmutz with a razor blade or X-acto at an angle.
-- The tab is there to wick heat away so it requires a good amount of heat to get the solder to start flowing on it. I used 775F which is pretty hot compared to the 675F I used on the other parts. Just put a small amount of solder on your tip and lay it down on the tab. When you can touch the tab with solder and it flows, touch it with the capacitor lead and you're golden.
-- If you're still having a hard time, the middle pin on the Voltage Regulator (the one that is cut off) is electrically connected to the tab, so if you have an easier time with that, the results will be identical.
-- If you still can't get it, the electrolytic capacitors you're replacing are also connected to the same net. It isn't ideal because you want your ceramics as close to the "problem" as possible, but if all other attempts have failed, you can try attaching them together with the 100uF caps.