How to recover files from formatted harddisk

A. Dead system—System "A"
B. Known working system—System "B"
C. I am assuming that the system board is posting and responding in the correct manner. And
that no Jumpers have been moved on any of the equipment.
Step 1. Verify power to Hard Drive (HD), Multi-tester (VDC), or another system plug. If power
(See step #2) If no power, swap/replace plugs/power supply.
Step 2. Swap hard drive from A to B and boot. If boot, then HD is good. (See step #3) If Noboot,
then replace HD.
Step 3. REMOVE...DISABLE if onboard.... all un-needed devices from System A...modem,
sound card...etc.
NOTE: Label HD ribbon cables A and B before removal from systems. "A" for System "A" and
"B" for System "B")
Step 4. Remove from system A and B the HD, and ribbon cable that connects it to the
motherboard...(MB)
Step 5. Swap drive and cables from B to A and connect to MB. If boot then controller on MB
"A" is good (See step #6.) If No-boot then MB controller is bad.... replace MB.
Step 6. Return HD's and cables to original systems, Remove HD ribbon cables from both
systems, swap B for A and boot...If boot then ribbon cable on A is bad...replace. If No-boot