Ok, I just opened up the iMac (I accidentally cracked some plastic off while lifting off the bottom housing, but don't worry, the iMac still works just as it did before), and had a look at the logic board. Wow, those capacitors are HUGE! Anyway, I saw the battery and recorded its information. I didn't actually take it out, since I don't want to have anything to do with the PMU just yet (I know what it is and the procedure now, don't worry). Where can I get a replacement?
Yes, I'm sure the battery is dead, after I had a look at the page that helped me disassemble the iMac. Here is an excerpt:
From www.scribd.com/doc/103447/iMac-G3-Disassembly-Guide:
"The battery on the logic board controls the stored system settings, such as date and time. It is only necessary to test the battery when you can't power on the computer, or the date and time are reset every time the AC power is removed.
The battery is also used to power the PMU chip (because the PMU chip keeps time and must always be running) when the computer is unplugged from the wall (AC power). The PMU is very sensitive and touching any circuitry that is connected to the PMU can cause it to crash. If the PMU crashes, the battery life goes from about five years to about two days if the PMU is not reset. Once the battery goes dead, the PMU will reset the time and date to 12:00 AM 1/1/04 every time the AC power is removed. To fix this situation, replace the battery and reset the PMU (refer to "Resetting the PMU on the Logic Board" mentioned earlier in this chapter)."
Notice the segment that says that the clock will read January first, 1904 if the battery is dead. In my first post, I mentioned that the clock reverts back to sometime in 1904. And I just checked the iMac upstairs: that is the time and date that it reads. I'm pretty sure I'm dealing with a dead battery.
Where do you think I can get a replacement?
-Edit: Never mind, I got one on Amazon for 8 dollars including shipping.
Thanks,
-Apostrophe
Yes, I'm sure the battery is dead, after I had a look at the page that helped me disassemble the iMac. Here is an excerpt:
From www.scribd.com/doc/103447/iMac-G3-Disassembly-Guide:
"The battery on the logic board controls the stored system settings, such as date and time. It is only necessary to test the battery when you can't power on the computer, or the date and time are reset every time the AC power is removed.
The battery is also used to power the PMU chip (because the PMU chip keeps time and must always be running) when the computer is unplugged from the wall (AC power). The PMU is very sensitive and touching any circuitry that is connected to the PMU can cause it to crash. If the PMU crashes, the battery life goes from about five years to about two days if the PMU is not reset. Once the battery goes dead, the PMU will reset the time and date to 12:00 AM 1/1/04 every time the AC power is removed. To fix this situation, replace the battery and reset the PMU (refer to "Resetting the PMU on the Logic Board" mentioned earlier in this chapter)."
Notice the segment that says that the clock will read January first, 1904 if the battery is dead. In my first post, I mentioned that the clock reverts back to sometime in 1904. And I just checked the iMac upstairs: that is the time and date that it reads. I'm pretty sure I'm dealing with a dead battery.
Where do you think I can get a replacement?
-Edit: Never mind, I got one on Amazon for 8 dollars including shipping.
Thanks,
-Apostrophe