As for the bios re-set, you have to follow the mfgrs instructions, so i would use another pc to get the mfgrs instructions on how to reset the bios. They do differ, for instance Pc chips and\or ECS motherboards differ.
However, most go this way, so try this, wont do any harm for sure! :
Unhook power from the wall and power from power supply to the motherboard. Then take out the coin battery. Now, there is usually a set of 3 pins nearest the coin battery, with the jumper on pins 1 and 2, move the jumper to pins 2 and 3, leave it for a few minutes, then put the jumper back where it was, put battery back in, and re-secure the power to the mobo and to the wall. While doing this you should ground yourself to the case and\or wear a grounding bracelet, either one. If not, just touch the metal case and keep an arm or elbow on it all the time will do the job.
It worth it as you may get the pc to at least boot. If not then you know the ps is likely dead.