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#31
The four pin cable that comes from the Power Supply, would be for a Motherboard connection for extra voltage. The DRAM refresh could be bad RAM or something else. You might want to find a mom & pop shop to look at the machine, since you are starting to get into problem areas that are harder to diagnose online, especially if the system is not booting, which can be due to a malfunctioning Motherboard or Power Supply.
Going by Crucial, this is the type of RAM that it uses: DDR3 PC3-12800 • CL=11 • Unbuffered • NON-ECC • DDR3-1600 • 1.35V •
This is the motherboard that machine uses. You will notice that it does not have a space for the 4 pin connector. Original New For Acer Aspire XC-100 Integrated AMD E2-1800 1.7G CPU Desktop Motherboard D1F-AD : laptop ac adapters laptop LCD cable laptop Motherboards laptop parts