Frank,
I am sorry to hear about this, the problem looks severe but mor often than not, it turns out to be a trivial thing, like a power cord out, or just pushing the memory back to the slot mey correct it.

anyway here's my two cents:
Shuttle and "shuttle like" PC's may look tempting but they are designed with space saving and appearance in mind.

They have a very strong reputation of sounding like blowers when turned on, because the same components that exist in normal size PC's are fitted in a much smaller space. Therefore they need strong fans and fans mean noise.