My 98 was being werid and kept rebooting and freezing after 5 minutes so i figured it must be overheating
We bourght a new case and heatsink
After installing everyhting in the new case, i went to turn it on but all the fans do are run for a second then nothing turns on but not the heatsink

We changed the motherboard and now all the fans even the heatsink, and the blue LED turn on for a second then turn on

HELP

It sounds like one of two things:

Either it is a problem with your power supply

Or there is a problem with something that you have connected to your board or a short.

Make sure you have only the basics connected, so disconnect your hard drives / cdroms / modem / network card e.t.c

Try it with all that disconnected and let us know what happens.

Could you also post the make and model of your motherboard so we can do some research

its the K7T-Turbo limited edition (not just the K7t etc they're different)
I already changed the PSU same problem
i'll try with the basics

Could you try and reseat everything like RAM, processor e.t.c

Also disconnect your keyboard and mouse, the only thing you want connected to the back of the PC is monitor and power.

Cons: is your problem solved now?

Marked as Pending.