T410 - how to recharge backup battery after - ERROR 0251 System CMOS checksum bad
Hey people
I would like to know how to recharge the backup battery ( internal one, keeping clock and date etc. )
i got the
Error 0251 System CMOS checksum bad— Default configuration used.
message and after looking at the T400 manual they write what to do:
Charge the backup battery for more than 8 hours by connecting the ac adapter.
ok sounds good, but i cant figure out how to properly charge it,
do i need to put the normal battery pack out and then attach it to the AC adapter, or not?
Does the laptop need to be running or will it be charged also turned off?
i would really appreciate if u could help me out and tell me the proper way to recharge!!
thanks already,
cheers,
Andi
Hello and welcome,
I didn't know that the backup battery was rechargeable. I don't think it is. You might be better off to just replace it.
The Hardware Maintenance Manual page 80 shows how to access it. According to the System Service Parts T410, the FRU number is 02K7078. They should be easy to find and inexpensive.
Z.
The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc. The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
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Error 0251 System CMOS checksum bad
When I take the battery out and power cord I get a error 0251 system cmos error right away. Is this a bad cmos battery or a corrupt bios that Ill need a recovery disk?
Hi Dantheman,
Try to reseat the CMOS battery first, or better replace it with a new one. You need to go to Sony's Authorized Service Center or a local technician if you're not comfortable doing this.
Thanks,
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If my post answers your question, please mark it as "Accept as Solution"
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0251 error system CMOS checksum bad
A couple days ago, I turned on my laptop (Satellite A105-S4201) and it send me to a black screen with some information and the warning: 0251 system CMOS checksum bad. It now sends me to this black screen with the warning every time I turn on the computer and every time it comes back from hibernate. I have tried leaving it on for 24 hours to charge the battery but this hasn't worked. I've also installed the BIOS 6.00 and I still get the same error.
When I go to setup, the time and date and everything is all correct; I've reset defaults and keep getting this message. It doesn't ask for a password, it just gives me the 0251 error.
I've had this computer for almost 4 years and have never had any problems before. I read somewhere that it could be a problem with the CMOS battery, but I also read that they usually last for about 10 years. If I do have to replace it, where could I go and how much would it cost?
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Hi Dantheman,
Try to reseat the CMOS battery first, or better replace it with a new one. You need to go to Sony's Authorized Service Center or a local technician if you're not comfortable doing this.
Thanks,
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If my post answers your question, please mark it as "Accept as Solution"
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Real Time Clock Error - Check Date and Time settings, System CMOS Checksum bad
Hello everybody,
Can help anyone to resolve my problem.
I have an Thinkpad W520 (42823FG), BIOS 8BET60WW 1.4 When I disconect AC power and remove battery and connect again, I see this message on screen:
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It's probably (hopefully) just the CMOS battery. The easiest way to find out is to just replace that battery.
Page 85 of the Hardware Maintenance Manual:
Hardware Maintenance Manual
Here's an example of the battery. I'm not recommending (or not) this vendor:
http://www.ebay.com/itm/New-Lenovo-ThinkPad-W500-W510-W520-W530-W700-W701-W701ds-CMOS-RTC-Backup-BAT...
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The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc. The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
English Community Deutsche Community Comunidad en Español Русскоязычное Сообщество -
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