blank screen and motherboard beep

[anonymous_user]

My computer:

Thermaltake 430W PSU

Chaintech 7NIF2

Athlon XP 2400

2 x 256 pc2100

80GB Western Digital

ATI Radeon 9800 Pro

Situation:

I just replaced the chipset cooler with a Zalman NB47J and when I assembled the computer back together, I just got a 4 second beep that repeats and the monitor was blank. No BIOS screen or anything.

Heres what Ive tried so far:

*I thought it was because of a misconfiguration of the front panel connectors, so I looked up the manual and put the cables as they should be. I tried various configurations with no luck.

*I tried clearing the CMOS and also taking out the battery.

*I disconnected/removed any cards or disks, just leaving the motherboard, fans, and memory.

*I tried booting with each ram stick individually and also put them in opposite slots.

*I connected the monitor to the integrated graphics instead of my ATI card.

My dad thinks its possibly fault of the Zalman heatsink. Should I try putting back the previous cooler?

Any other suggestions?

P.S. I dont think the PSU is at fault. Its fairly new and should provide enough power.

[Maleko]

if it happened just after you changed the cooler, yes, change it back, see if its ok

BEFORE you do, make sure your cooler is seated right.

did you use thermal paste?

[anonymous_user]

The new heatsink is firmly attached and yes I used the thermal paste that came with the heatsink.

[Maleko]

check all componets are seated right, reseat them firmly, like memory, graphics.

did u try the old cooler?

[anonymous_user]

Ive reseated the components several times and I did try the old cooler with no change in behavior