>>Problem: continuous long beep sound when switch on the computer and no display.

Causes:

i. RAM do not fix properly on RAM slot.

ii. Motherboard may be damage.

iii. Display card doesnot fix properly.

iv. Display card may be damage.

Solutions:

i. Fix RAM on RAM slot and re-start.

ii. Change motherboard and re-start.

iii. Check and fix porplery.

iv.Change display card and check display.