I recently bought a ASICMiner cube off ebay as a faulty item. The previous owner stated that it was working fine in high clock for a few months then after a power cut the PSU died and though he tried another PSU he said it would power up for a couple of minutes before shutting down without mining, or power on and only mine for a short time then power off. I thought it sounded as though he was just not powering it with a sufficient PSU, so took a punt and got it really cheap.
The cube arrived today and before I powered it up I opened and inspected it. I cleaned it all up and made sure the heat sink screws were tight etc.
While it was apart I noticed that a couple of pins on one of the PCI-e power ports had a large ugly blob of solder bridging two pins in the 12v row. I de-soldered this, but everything else looked ok visually.
I connected it up to a 850W PSU which is rated at 42A on it's single rail and the cube fired up fine and started mining at 32 GH/s all day on low clock.
Unfortunately whenever I switch to high clock in the web control panel, it changes to high and mining stops, the cube clicks, then after about 20-30 seconds it clicks again and automatically switches back to low clock and continues mining. It never starts on high clock and just reverts to low.
For the money I paid for the cube I'm more than happy for it to sit at 32 GH/s forever, but it would be nice if I could get it to work on high clock.
I have searched around a lot but not found an answer, any ideas welcomed.
Thanks.