1 look at them in the dark when power is running through them if you see a blue or orange arch your cable is faulty or use a mega ohm meter wrap the outer cable in foil ground it then mega it
Check for BIOS updates, if it's an IDE drive make sure that all jumpers are in the correct order. Check cables (power, data) for cracks, damages.
Have you checked all of the High Tension leads from the distributor to the plugs, or just one or two? Same with HT lead from Coil to Distributor, Check Distributor cap for cracks
An LT panel is a device that receives power and distributes it to other devices and boards. An HT panel is the same thing except it is used for high tension cables.
The test equipment used to test high voltage cables is a hi-pot test where a high DC voltage is a applied to the cable. This voltage can be from 150% to 200% of the working voltage of the cable.See related links below.
changing all the cables
check your battery cables loose or dirty cables will cause this. if the problem persists check the reg/rectifier
check for cracks and chips
Have the head magna fluxed at your local machine shop. You cannot visually check for all cracks.
Thaw it out and check for cracks or leaks
Check fuses.
eggs
Check the battery and see if it is charged or needs to be changed. Check the battery cables Check the starter condition