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| Thread ID: 79178 | 2007-05-10 23:54:00 | VAIO PCG-K64 & System Date | bk T (215) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 548922 | 2007-05-10 23:54:00 | This Sony laptop does not hold the system date when the AC Power is turned off. Is the battery dying? I can still run the machine with its battery alone, though. Or, there is another tiny battery to hold the CMOS settings within, just like the Desktop machines? Cheers |
bk T (215) | ||
| 548923 | 2007-05-11 06:24:00 | There will indeed be a little cell, just as in a desktop. Its main function is keeping the hardware clock running. The traditional function of retaining BIOS configuration settings came about because the chip IBM chose for the hardware clock in the AT model happened to have more memory registers in it than were used for the time. IBM realised they could save on jumpers or switches on the motherboard by using the extras as memory. If the lithium cell dies, the hardware clock stops. The date is lost because the memory locations storing it are no longer powered. (The memory, or the clock, can die first ... it depends on how fussy they each are about low voltage. The clock might speed up, or slow down as the cell goes down). |
Graham L (2) | ||
| 548924 | 2007-05-11 07:00:00 | It looks as if the cell you need is a CR1220. That's not as common as the 2032, but I've seen them in Trademe, and Jaycar normally stock them. | Graham L (2) | ||
| 548925 | 2007-05-11 09:06:00 | It looks as if the cell you need is a CR1220. That's not as common as the 2032, but I've seen them in Trademe, and Jaycar normally stock them. Is it easy to replace it? Do I have to open up all those screws, etc?? |
bk T (215) | ||
| 548926 | 2007-05-12 04:43:00 | That's a very good question. :D I don't know. Thos VAIO laptops are very nice ... I've drooled ... but I've never opened one up. If it's relatively easy to do, there should be instructions in the manual. Opening up a laptop often involves more than just removing screws. There are even special tools which Apple, for example, actually specify for openeing the case along the seam. (I use a thumbnail). Damage can happen if force is used as a substutute for the knack. If none of the links Google give from "vaio pcg replacing CMOS" is useful, or the manual doesn't help, I'd go to an expert on Sony laptops. They'll do it non-destructively, and shouldn't charge too much. ;) |
Graham L (2) | ||
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