T61 Died will not power on!!

[biged143]

My T61 was working fine.I think it started to run hot.It shut down on its own and will not power on. I have done the following in the order posted. Hard reset with battery out and AC off,put my spare power supply on,reset the memory, replaced the power jack (had planned to as it was very loose inside) checked the fuse under the the power jack (mobo is out of case)whenpower is connected no lights lite not even the battery light. Oh yeah I tried the spare battery that was fully charged in another T61 and it made no difference.
Does anyone have any suggestions ? PM are welcome!! Thank you in advance!!!!!