sounds like the laptop is gone. I found the following possible solutions from another website. same laptop, same problem.
1. take battery out, unplug the adapter, if the adapter is two parts, take it apart. Press and hold the power button for one minute. put the battery back in then plug it back up. restart
2. pull the ram from the laptop, restart, if it beeps, the motherboard is good.
if the above does not work, then I am out of ideas. It really needs to go to a repair shop for proper testing but because of the age of the laptop, imo, it's not worth it.