Ok new problem My Compaq is still beeping and now the screem stay

Hi Mate

Unless you have just added a new harware component this is realy bad news. If you have remove whatever it is and see if you can't get the system to boot.

Sounds very much like the MB has failed, probably due to a power spike. If the unit is still under warranty it would be worth trying to make a warranty claim otherwize most home and contents insurance cover this type of damage.

If you realy want to trouble shoot yourself and see wether it is the MB crack the case and pull everything bar the cpu, ram and vga, flash JP1 or BIOS/CMOS jumper and see wether it will boot with a single tone and a display. If it does your on a winner just start reconecting each component one at a time re-booting each time untill you come across the component that has failed and replace it.

O.K. just a few hints for working on the guts of a computer:

Static precautions: No need for an anti static wrist strap just make sure that at all times that you are handling an internal component that the power is off at the wall, one part of your body is in contact with the frame of the computer and that you handle cards/RAM by the edges or the "tounge".

Flashing the BIOS: This sets the MB back to its factory set defaults, basicaly a safe/optimal configuration. the jumper will be labled (in teeny weeny litle leters) as JP1, BIOS or CMOS or even CIMOS. It will have three pins with one jumper covering the central pin and one other. WITH THE POWER OFF. Move the jumper so that it covers the central pin and the previously exposed one, hold for three seconds and return back. This is efectively the hardware equivalent of the three fingered salute.

Hope this helps but if I was a betting man I would have my money on the MB, keep all the rest of your components and replace the MB wich will probably require a change in CPU.

Sacraficial power boards with LAN and modem conections are inexpensive and save a lot of tears.

Kind regards