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I tried backflashing to A05 then to A03, A03 is what the system shipped with. No luck. Is something corrupt?
<>What color are the 4 diagnostic LEDs on rear of the tower when you try to boot up? If not all green, look up error code here.
When you say "replace the battery", is that reinstalling the old one or using a new one? I'd try a new one if existing one is more than ~2-3 yrs old.
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Can you put the system back the way it was with original hard drive and RAM and try again?
Are you sure the new RAM is fully compatible with this system?
Unless somebody's got a better idea, failed motherboard...? :(
You can buy a brand new Dell OEM motherboard for the 4700 with 30-day warranty from Centrix for $59 + shipping. Also check the price at Dell Spare Parts 1-800-357-3355.
I asked some of the experts on the forum for their opinion and the concensus seems to be that your motherboard failed. :smileymad: