I have 2 acme Jaguar disco lights i need 2 replacement scanner tubes(mirrors) and leads

answer
test all leads that attach to your hard drive including electrical extensions SATA

the leads from your (motherboard to your hard drive) make sure they have a secure dust free connections and are not faulty or just replace them they could be faulty

make sure all leads that are attached to your drives dvd\cd have secure connections and are not faulty

even something as small as faulty fan lead can cause you problems computers need all of the data and power to travel through every working device and to have an end for a computer to be able work properly

a motherboard and a hard drive any leads between them will fail before your motherboard or your hard drive check all electrical extensions make sure they are securely seated even the cd/dvd drives need to have current go through make sure these devices are working

check the CPU central processing unit make sure it has thermal paste and dust free secure seating

also check your computer ram modules and cmos battery make sure it has charge and they are dust free and securely seated some motherboards cmos batteries are soldered in

hope it helps