Quote from: MrTeal on December 25, 2013, 05:16:13 PM

This was the one with the short on the 3.3V rail, right?
I've never seen anything like that. I had one that came in that had one ASIC that didn't work; it had a crack along one side of an ASIC and another ASIC had a crushed corner. That was pretty obvious physical damage though.

It's too bad that the ultrasonic bath didn't help any further. Do you know if Keefe used something conductive/capacitive like Arctic Silver?

That's the one. He hasn't, but I have. I applied it to the heatsink, not the ASICs, and a very thin layer that has contacted the tops of the ICs but never the sides or board.

The chili flash utility gives me the following:

DEVICE: Chili SC
MANUFACTURER: MrTeal and ChipGeek
FIRMWARE: 1.2.14e
CHIP PARALLELIZATION: NO
QUEUE DEPTH:40
PROCESSOR 3: 1 engines @ 172 MHz -- MAP: 0080
PROCESSOR 4: 11 engines @ 194 MHz -- MAP: FFE0
THEORETICAL MAX: 2.30 GH/s
ENGINES: 12
FREQUENCY: 192 MHz
CRITICAL TEMPERATURE: 0
TOTAL THERMAL CYCLES: 0
XLINK MODE: MASTER
XLINK PRESENT: NO
OK

At this point I'm giving up. Normally, I'd return it, but it's hardly Keefe's fault this happened. I think simply the stress of removing and replacing the heatsink may have done it in. it won't mine and I don't know how to fix it.

If anyone would like to buy the mostly dead board off me for experimentation, PM me. Be aware, the ARM chip works, but everything else is unverified/unknown. All I changed was putting stick on memory cooler chips on the power mosfets, and ultrasound clean it when I discovered debris under the edge of an ASIC (which may, but probably may not, be responsible)... Failing a buyer, I'll mail it to MrTeal so he might learn from the failure if it has any lessons that apply to other boards.

Also, Keefe has been more than fair, and this in no way represents any reflection on him. He sold me a known glitchy board, and stated so up front. It worked here for 18 hours before dying while I wasn't present. I appreciate the supportive PM that suggested I get my money back, but it's not Keefe's fault.

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