On Tue, Jan 25, 2011 at 7:13 AM, Jean-Luc Brousseau <brousseaujeanluc at mac.com> wrote: > I have a PowerBook 3400c that refuses to turn on. I checked the power supply > that seems to be OK since I have voltage at the plug going to the computer. > I checked the PRAM batteries that are rechargeable but that are at 0.5 volt > instead of 7.2 volts. Maybe they are so low because they do not charge > anymore. What is suppose to charge them? They are the original Varta > batteries. > I know that on some computers if the PRAM battery is dead, the computer does > not start. Is it the case with the 3400c? > Only sound is a small click in the speakers when I plug in the power > supply. Anyone can give me information about finding the problem of this > computer refusing to start? Your message is way off-topic for the G4 List, as the PowerBook 3400c is nowhere near a G4 Mac. In any case, the PowerBook 3400c Service Manual from Apple states: Power Note: You will hear only the click of the power-on button when you attempt to start up a computer that lacks sufficient power to start. Computer won’t power up: 1 If sleep LED is continually on, backup battery power has been interrupted. Restart computer by holding down reset actuator 10-20 seconds. If computer doesn’t restart, repeat 3–4 times. 2 Try known-good power adapter. 3 Try known-good, charged battery. 4 Connect power adapter and restart computer in 3–4 minutes. 5 Replace power supply board. 6 Replace logic board. For further discussion you may wish to post to the LEM PowerBooks List: <http://www.lowendmac.com/lists/powerbooks.shtml>, where many members own the 3400c and similar PowerBooks.