If motherboard was bad, then how could they determine disk drive was
also bad? They could not. Meanwhile, the stop error message is not
from a bad hard drive. The error message describes a bad file on that
disk. To get that message, the disk drive had to work just fine
reading other bootup files.
Many computer assembler don't even know how electricity works. They
proclaim themselves as computer repairmen and give the industry a bad
name. Meanwhile run Dell's diagnostics now that you have a new
motherboard - can now test what the computer shop could not.
Look at facts and numbers. Details twice over say the original disk
drive was not defective because 1) that is what the error code said and
2) you could not have gotten that error message if the hard drive
hardware was defective.
Now you have a new drive and motherboard. Don't for one minute look
at or execute windows. Now run the Dell comprehensive diagnostic on
that hardware. Need not even go beyond the Dell splash screen. What
does the BIos do? If you cannot get into BIOS, then motherboard is
defective. More examples of testing without windows.
Another excellent tool here is a DOS boot diskette or CD-Rom. Boot
the system without a disk drive. Again, stepping through the process
to learn what does and does not work. Anything in that process you
don't understand, then post here for further clarification. Your
responses will only be as good as information provided. For example,
the stop error code was provided which therefore reports no hard disk
problem - no matter what that repair shop declared.
BTW, if you don't have the Dell diagnostic, then get the disk drive
manufacturer's diagnostic. Again, breaking the problem down into parts.
One final point. These type problems are also symptoms of a
defective power supply system. Did the shop provide voltage numbers
for each voltage? Not just voltage OK. That is woefully insufficient
information. What numbers actually were is also relevant information
that could explain strange failures blamed on the motherboard. Too
many computer repair shops see a voltage, don't look at the number, and
declare that sufficient.
Meanwhile, your original post is not available.