Hello,
recently I bought one Lenovo 3000 N100 (without a battery), and have following issue with it: when it remains longer disconnected from the power supply, it doesn't start at first button press. At the second one it starts, but says "Time and date are not set, CMOS checksum is bad". When I go to BIOS, it says "01/01/2015". I suppose, the BIOS battery is empty. Is it possible to replace CMOS battery (like in thinkpads)?
regards,
Andrey
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3000 N100 - date and time are getting reset, CMOS battery empty?
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3000 N100 - date and time are getting reset, CMOS battery empty?
- in use -
(1) TP R61i Frankepad - 4 GB / C2D T9500 / 180 GB SSD / UXGA display
(2) Lenovo 3000 N200 - 2 GB / C2D T7300 / 160 GB
(3) TP T450s
- in museum -
IBM 600x, IBM TP T43p, Lenovo TP Z61t, Lenovo TP X60 Tablet
(1) TP R61i Frankepad - 4 GB / C2D T9500 / 180 GB SSD / UXGA display
(2) Lenovo 3000 N200 - 2 GB / C2D T7300 / 160 GB
(3) TP T450s
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IBM 600x, IBM TP T43p, Lenovo TP Z61t, Lenovo TP X60 Tablet
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Re: 3000 N100 - date and time are getting reset, CMOS battery empty?
Took a quick look at the N100 HMM https://download.lenovo.com/ibmdl/pub/p ... 553_03.pdf but I can't seem to find a replaceable CMOS battery. It's possible that the CMOS battery is a rechargeable one that's soldered to the system board.
Confusingly, the Symptom-to-FRU Index mentions:
It's likely that the main battery is needed to keep charging the backup one in order to keep the date and time.
Confusingly, the Symptom-to-FRU Index mentions:
#1 proves that there's a rechargeable backup battery, but #2 implies a removable battery but is never mentioned in the disassembly section.0270
Real time clock error
1. Charge the backup battery for more
than 8 hours by connecting the ac
adapter.
2. Replace the backup battery and run BIOS
Setup Utility to reset the time and date.
It's likely that the main battery is needed to keep charging the backup one in order to keep the date and time.
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Impulse Buy: Thinkpad not named for safety reasons
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Re: 3000 N100 - date and time are getting reset, CMOS battery empty?
Thanks you very much for the hint. I found on the Internet, the type of battery - fixed or replaceable - depends on the type of the laptop.axur-delmeria wrote: ↑Sat May 18, 2019 2:14 amTook a quick look at the N100 HMM https://download.lenovo.com/ibmdl/pub/p ... 553_03.pdf but I can't seem to find a replaceable CMOS battery. It's possible that the CMOS battery is a rechargeable one that's soldered to the system board.
Confusingly, the Symptom-to-FRU Index mentions:
#1 proves that there's a rechargeable backup battery, but #2 implies a removable battery but is never mentioned in the disassembly section.0270
Real time clock error
1. Charge the backup battery for more
than 8 hours by connecting the ac
adapter.
2. Replace the backup battery and run BIOS
Setup Utility to reset the time and date.
It's likely that the main battery is needed to keep charging the backup one in order to keep the date and time.
Going to put the laptop on the power over the night.
Regards,
Andrey
- in use -
(1) TP R61i Frankepad - 4 GB / C2D T9500 / 180 GB SSD / UXGA display
(2) Lenovo 3000 N200 - 2 GB / C2D T7300 / 160 GB
(3) TP T450s
- in museum -
IBM 600x, IBM TP T43p, Lenovo TP Z61t, Lenovo TP X60 Tablet
(1) TP R61i Frankepad - 4 GB / C2D T9500 / 180 GB SSD / UXGA display
(2) Lenovo 3000 N200 - 2 GB / C2D T7300 / 160 GB
(3) TP T450s
- in museum -
IBM 600x, IBM TP T43p, Lenovo TP Z61t, Lenovo TP X60 Tablet
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- Junior Member
- Posts: 269
- Joined: Wed Feb 02, 2005 4:37 am
- Location: Hamburg / Germany
- Contact:
Re: 3000 N100 - date and time are getting reset, CMOS battery empty?
Update: CMOS battery keeps the date and time after keeping my laptop on the AC power for 8-10 hours.BigCatAndy wrote: ↑Sat May 18, 2019 9:50 amThanks you very much for the hint. I found on the Internet, the type of battery - fixed or replaceable - depends on the type of the laptop.
Going to put the laptop on the power over the night.
Regards,
Andrey
Cheers,
Andrey
- in use -
(1) TP R61i Frankepad - 4 GB / C2D T9500 / 180 GB SSD / UXGA display
(2) Lenovo 3000 N200 - 2 GB / C2D T7300 / 160 GB
(3) TP T450s
- in museum -
IBM 600x, IBM TP T43p, Lenovo TP Z61t, Lenovo TP X60 Tablet
(1) TP R61i Frankepad - 4 GB / C2D T9500 / 180 GB SSD / UXGA display
(2) Lenovo 3000 N200 - 2 GB / C2D T7300 / 160 GB
(3) TP T450s
- in museum -
IBM 600x, IBM TP T43p, Lenovo TP Z61t, Lenovo TP X60 Tablet
-
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