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Do you know how old the battery is? Check the top of the battery or one of the sides. It will have a date code stamped into it. If the battery is an AC Delco, I would almost bet its factory and needs changed. You can always take the vehicle to any auto parts stores and they will test your battery (while still in your vehicle) for free. Not only will they test it for free, most will install it for free also. If you want to know more about date codes on batteries I've included a basic instruction on reading the codes. This code system is pretty much the same no matter where the battery was bought or what brand it may be.................Date codes can read either 10/12 (Oct 2012) or B2 (Feb 2012). Keep in mind AC Delco sometimes has codes that would read 2B (opposite but still means Feb 2012, they just like things backwards I guess).
The Invacare Pronto M51 takes two size U-1 batteries. There may be some prefix letters but the battery size is U-1. They can be purchased on-line or locally at a big discount so shop around. I have seen them discounted at $40 each but you need to be careful that you get the correct type. You are looking for deep cycle sealed lead acid batteries. The AGM (advanced glass mat) is preferable for longevity and will cost more.
This is a very popular battery and should be in stock at most places. Make sure to check the date code on the battery to get fresh ones. The way to read the date code is a little tricky. The sticker will, for example, have a date code of H9. This battery was manufactured on the H month or 8th month or August of 2009. In this example, you do not want to purchase this battery. You do not want to purchase a battery that has been sitting around for more than 3 months. Hope this helps.
There are tiny Li batteries to maintain the short term memory for interim period. Normally they last very long but unexpected can be expected. You may not have enough tools to open it & reach there. Either go to camera repair or just entering it everytime or give it to the kids & buy new one instead of repair.. firstname.lastname@example.org
Go into your BIOS and change the date there and the save changes and exit. Hopefully on the reboot when you get into windows the dtae will read prroperly If it does then turn off the laptop and then turn it back on and see if the date is still reading properly. If it does then you know it was a BIOS issue.
If the date still doesn't read properly then you know that the BIOS battery is weak and not holding memory and so the battery would need to be replaced.
First you must get into the service mode by keying in 10871087
The screen will start blinking - then key 163 and the screen should read cancel or execute -select execute
when it is complete turn unit off then back on and see if that worked, if not buy a new fuser unit. They cost around $150,00 to $200.00 depending on who you buy it from.
Sure , you need to change the battery in your motherboard. Often it looks like a silver coin. What happens is that your bios setting are reset to default each time you restart PC, before updating bios (that is the solution from hp that you are trying), change the battery.
Check this link - i think your question is answered quite well;
Sorry if not great news - these are the guys to contact for more info or to complain - please do or we will never stop this sort of thing;
Hope it helps some :)