boot issues

I've got an old Dell inspiron 17 inch i think its a 9300. Its from 2005/6 and I've used it through my uni days. Pulled it out of storage recently and cleaned it up and charged it and tried turning it on. It turns on for about 3 seconds and then just switches off as though its lost power (even...

Hello, I am a little desperate, as normal for a Avell B155 Max, ClevoW650SJ, Schenker M504, or SAGER NP6658 computer owner, and I red all over the place that this issue is very common but no solution has been given whatsoever, and I will try to bring this issue up again to help me, help other...