I have a Sony Vaio PCG-FRV37 that I'm trying to repair for a friend. I checked the power supply then charged the battery for hours, it will not make any noises only the green power light & amber battery light come on for a second as if the battery were dead. with the battery out & running on PS, same thing. He said it was working fine until he put it away for a spell. I have taken it apart several times checking for loose connections etc. Any help is appreciated, thanks, rgrut.