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| Thread ID: 45067 | 2004-05-08 03:57:00 | CMOS Checksum Incorrect | Woody (710) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 235187 | 2004-05-08 03:57:00 | I frequently get "CMOS Checksum incorrect. Defaults Loaded Press F1 to continue" error on bootup. Normal after pressing F1 Recently in addition I found that the date/time had reset to 1/1/2003 00.00pm Machine is P4, 256Mb RAM, PC Co ( now belly-up) Any suggestions please. Rgds |
Woody (710) | ||
| 235188 | 2004-05-08 04:06:00 | Sounds like your battery might be dead/dying. The BIOS requires the battery to hold your settings - if it dies, the settings are reset. You can replace PC batteries fairly easily. Mike. |
Mike (15) | ||
| 235189 | 2004-05-08 04:06:00 | There isa battery which keeps a clock running when the computer is off, and also maintains the CMOS memory which holds the BIOS settings. You need a new battery. It is most likely a lithium button cell (probably a "2032"). It is a 20 mm diameter disk looking like a coin. Be careful removing the dead one --- it's easier to break the clip than it is to fix it. ;-). The Warehouse or an electronics shop will have the replacement. |
Graham L (2) | ||
| 235190 | 2004-05-08 04:18:00 | The model number is usually printed on the battery/cell itself. | agent_24 (4330) | ||
| 235191 | 2004-05-08 04:40:00 | Thanks fellows I was sort of thinking along those lines but the PC is only oneyear old and I figured that the battery would have lasted longer but I'll certainly check on that. Would a dying battery give the checksum error as well? rgds |
Woody (710) | ||
| 235192 | 2004-05-08 04:44:00 | Further to my prev post - will the rest of the CMOS settings eg HD, partitions etc hold whiile replacing the battery? | Woody (710) | ||
| 235193 | 2004-05-08 04:44:00 | The checksum error and the clock stopping make me certain that the battery is dead. They should last longer. Some don't. ;-) | Graham L (2) | ||
| 235194 | 2004-05-08 04:49:00 | The partition tables aren't in the CMOS. They live on the disk. The autodetect and default settings seem to be OK --- they are what you are getting when you "press F1". The settings are being lost each time the computer is off for a few hours. When you replace the battery, you will need to use the BIOS setup, (select the default settings and set date and time) and "Save and Exit" to get rid of the error message. |
Graham L (2) | ||
| 235195 | 2004-05-08 04:50:00 | Thanks Graham. Will do Rgds |
Woody (710) | ||
| 235196 | 2004-05-08 04:54:00 | yea, most motherboards come with a battery, and i suppose they use half-price 10 year old ones | agent_24 (4330) | ||
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