So RAM Testing is behaving funky, and you suspect it is not the RAM. First off try with known good RAM, one that is the correct speed for the board and has already been tested.
RAM testing is powered by a single power cord, a power bar is attached to this cord (or directly into the wall) Ensure this power bar is on and all other power bars are on. They should have a red light on the switch when on.
Put In RAM
For the particular motherboard select one tested stick of RAM and insert it into the board. If you can't insert it it is the wrong type of RAM, if it doesn't stay in the board look closely for a broken RAM socket. If the socket is broken the whole motherboard may need to be replaced.
Turn On Power Supply
Each individual motherboard has a power supply which may or may not have a switch on it. Turn this switch to the closed position as opposed to open ( I vs. O). The mother board should power up and it's fans will start spinning.
If the board does not power up there are three options:
BIOS Not set to start on AC Power (Loss/Restore)
If the BIOS has reset to defaults or not yet been configured it will usually not power on when the power supply is turned on. Turn on the motherboard by momentarily crossing the power switch pins (often labeled PWRSW) and enter BIOS. Configure AC Power Loss to always be 'Power On'. Most BIOSes have this option or an equivalent by another name. Save and exit bios then turn the computer off and verify this solves the problem.
No AC Power Loss option in BIOS
A few rare boards have no option to power on when ac power is restored. On these install a manual power switch and use that after turning on the power supply.
Power Supply Faulty
Verify the power supply is plugged into the mother board, and if so the power supply is likely faulty. Use a power supply tester to verify and replace the power supply.
Boot to network
The motherboard should now boot to the FGV network menu.
Black Screen 1
If it instead boots to a black screen (possibly with a single underscore (blinking?)) then the boot order is wrong in BIOS. To fix reboot the computer and enter BIOS, change the boot order so the first device is Network (also called PXE, Int13 device or something similiar). For motherboards with onboard network cards the Network Boot Rom option may first need to be enabled before a Network boot option will appear to do this enable the Boot Rom option then save and exit BIOS, reboot and reenter BIOS and configure the boot order.
The computer should boot past POST and display a screen with a MAC address (possibly also a GUID) and usually a line saying 'DHCP..' with another '.' added every second. If it displays this screen but says something about check media then the network card does not detect a network cable plugged in, verify a network cable is attached to the network port and to the switch. Verify the switch is powered on. Usually this screen will be up for 3-5 seconds. If it does not get past the DHCP line and the network cables have been verified (including the uplink from the switch to the network) there may be an issue with the DHCP server, contact your network admin.
If it passes the DHCP line and then is stuck on a TFTP line for a long time (10 seconds or longer) this usually means the network ROM for the network card doesn't support our network configuration, try another network card until you find one that works. If all stations are stuck at the TFTP line there may be a server problem, contact your network admin.
Black Screen 2
The second black screen you can get is after the DHCP/TFTP boot screen, some video cards (particularly integrated ones on cheap boards) aren't support by our network boot. If this is the case replacing the video card (or board if it is integrated) is the only option.
Insufficient low memory
A rare few motherboards will say something about 'Insufficient low memory' when attempting to run memtest. This is due to an unusual BIOS and we have no current work around for RAM testing, replace the mother board with another one.