During the troubleshooting of a PC that will not boot, it is suspected that the problem is with the RAM modules. The RAM modules are removed and put into another PC, which successfully powers on. The RAM modules are then put back into the original PC and it now successfully powers on as well. What was the most likely cause of the problem?
Note
Explanation:
If RAM is not seated firmly in the motherboard DIMM slots, it will not function properly. RAM cannot be inserted backward into a DIMM slot because both the RAM chip and the slot are keyed so they only fit one way.