I recently purchased a second hand DM800HD and it appeared to be a clone. (after a no CA found ) I managed to upgrade the bootloader 84D and have ran an OpenPLi image for about a month until suddenly the box gave the error no tuner detected, check tuner settings. So after a lot of googling around I came around this board, which has been super helpful so far. I've managed to check the motherboard voltages which all appear to be ok. SOURCE If the box has cooled down for some time (couple of hours) the tuner is recognized again, but after the first error I am only receiving the EPG for about a minute before the failure occurs again. After disassembly it appeared that a cap had blown, which I've replaced with a suitable one, but that didn't help either. If I keep poking around in the tuner configuration menu it will GSOD rather quickly. What I think is strange that I am also not able to playback the recordings, it plays for 2 seconds and then the picture freezes. The box is normally responsive and I can scroll through menu's and such. I've tried another (OEM Dream Multimedia) tuner and while the box boots and recognizes the tuner fine it still doesn't work. Since I don't want to kill my spare (DM8000) tuner I didn't leave it in for too long. If I do not assemble a tuner the box plays all the recordings just fine. Anyways, I have a multimeter at my disposal but it wasn't really suitable for checking out the tuner itself. I've used another guide from this website. SOURCE And I've found that I do not have a 13V at the stated pin. The tuner is a "genuine" Sim 2.01 type, Rev. M Is this tuner repairable, since I don't feel much for spending a huge amount of money on a heavily dated clone blox which undoubtedly has many more surprises in store for me .