I have a tv tuner card (DVICO dual digital 4 - two DVB-T tuners through a USB - PCI bridge) in my Linux PVR box, built on an Asus M4A785T-M. I have it set to sleep (S5 - off, but waking on RTC alarm) and wake up to record shows, then sleep again if no one is using it. Randomly, but maybe every 3rd - fifth time lately, the tuner fails to start during boot and the computer just sits there instead of recording shows. To fix this, I disconnect the power for ten seconds, which works every time.
Is it fair to assume that this is a piece of dodgy hardware on the motherboard (the notorious capacitor aging)? If I reboot into Windows there is no improvement - the hardware shows up as unstartable. I guess it could also be the tuner card, although that's simpler device.
My first look at replacing it found the cheapest AM3+ mobo is an ASrock 980DE/US3, which looking on NewEgg, is OK for some people, quibbly for a few and is sometimes DOA (assuming I can get it replaced this is not a deal breaker). I couldn't find a good guide on its power characteristics - is 10W a lot for a system that is off? /it seems like a lot to me.
Athlon 620e, Asus 7790 (1GB), 8GB KVR 1333, Asus M4A785T-M, Samsung 830 256GB, WD Green 1TB, WD Green 2TB, E-mu 1212m, Dvico HD Dual Digital 4 TV tuner, Hyper 212 Evo (mounted ironically), Antec Earthwatts Platinum 450W.