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I replaced the RTC battery in my Toshiba Satellie P105 because the clock was losing time. When I restarted, the hard drive and fan would cycle on/off, black screen, no beeps. After a couple of minutes, she's dead. No response to on/off. AC light comes on, battery light goes amber then blue. Then nothing. Somebody help me.

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  • 238 Answers

1. Check your power cord & adapter.
2. If its working then check the battery, reseat the battery & check.
3. If available then check with another battery
4. If no, then remove the battery & switch on the PC in AC mode.
5. Check if battery charging indication or AC power on indication is glowing. if not then need to change ur motherboard.
6. If indication is OK, but could not power ON then check ur RAM for any loose connection or dust. clean & reinstall.

Posted on Aug 21, 2010

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1 Answer

Why is my toshiba Satellite P-850 clock loosing time


It *might* be
- that the "CMOS battery" (normally a coin cell about 13mm in diameter) is dead, in which case you should replace it.
- The crystal which stabilizes the RTC has drifted.
- If this problem has always occurred it may be the that the RTC chip is defective, but this is highly unlikely, and even less likely to have developed a fault with time.
- if you connect to the internet frequently (several times per day) the above can be ruled out (I think).

See for example (just one of thousands) http://www.makeuseof.com/tag/3-reasons-windows-computer-loses-time-date/

Search the internet on terms similar to "real time clock in pc loses time" for more ideas

28.July.2014

Jul 28, 2014 | Toshiba Satellite Computers & Internet

1 Answer

Emachine T 5212, when i turn it on,, a siren sounds,,then computer shuts off


In your computer (as well as other gadgets), the battery powers a chip called the Real Time Clock (RTC)chip. The RTC is essentially a quartz watch that runs all the time, whether or not the computer has power. The battery powers this clock. When the computer boots up, part of the process is to query the RTC to get the correct time and date. A little quartz clock like this might run for five to seven years off of a small battery. Then it is time to replace the battery.

This does not explain why your computer would not boot, however. You would expect the computer to boot fine but have an incorrect time and date. The reason your computer would not boot is because the RTC chip also contains 64 (or more) bytes of random access memory (RAM). The clock uses 10 bytes of this space, leaving 54 bytes for other purposes. The BIOS stores all sorts of information in the CMOS RAM area, like the number of floppy and hard disk drives, the hard disk drive type, etc. If the CMOS RAM loses power, the computer may not know anything about the hard disk configuration of your machine, and therefore it cannot boot.

Many more modern computers are not quite so dependent on the CMOS RAM. They store the settings innon-volatile RAM that works without any power at all. If the battery goes dead, the clock fails but the computer can still boot using the information in the non-volatile RAM area. I would change the battery and make sure unit is unplugged and my other hand is touching the metal frame on the computer to stop static discharge. Blow out the inside of the computer completely.Start computer with case off and make sure all the fans run and don't sound like a siren.Replace anything not running.It may not boot if the BIOS can't see the hard drives. You might have to start computer and watch the screen and when it asks you to hit a key to get into like the bios do it and see if you can reset it. If nothing seems be running right maybe the power supply went out they are real cheep at Tiger Direct.

Jan 24, 2013 | E-Machines eMachines Desktop PC

1 Answer

Toshiba a60-155. keep getting press f1 setup screen. have to enter date. keys 1 and 2 don't seem to work. can I bypass this page


Don't think you can bypass this thing because the RTC (Real Time Clock) battery is, most likely, dead. But if you can replace the just the keyboard, then you'll still have a working computer. I'd leave the RTC battery alone and use software (such as Atomic Clock Sync) to set the date and time automatically every time the computer boots into Windows.

Jul 08, 2011 | Toshiba Satellite A60 Notebook

1 Answer

The Toshiba Tecra A8 S8413 laptop cmos battery (or capacitor?) does not seem to be working. Symptoms: I set the date and time. As long as the laptop does not sleep or go into power save mode the clock...


The RTC (Real Time Clock) battery charges when the computer in on (operating). You can plug the electrical cord in and let the computer run for 24 hours by temporarily suspending any sleep mode or automatic power saving features. This should sufficiently charge the RTC battery.

Nov 30, 2009 | Toshiba Tecra A8-S8513 Notebook

2 Answers

I get the message "Bad check sum (CMOS)" Model toshiba tecra 730XCDT


hi friend,

Probably a dead Motherboard battery. Need to enter the BIOS screens and reset values. Especially the time and date. Maybe the boot order and if using USB KBoard enable legusy USB devices. This will occur each time your friend shuts down and reboots until the battery is changed.
Issue
When you turn your Toshiba computer on, you see an error message like: **** Bad RTC battery ****
**** Bad Checksum (CMOS) ****
Check system, then press [F1] key The Real Time Clock (RTC) battery provides power for the internal clock/calendar and for maintaining system configuration settings.
This error can occur when a machine has been left turned-off for an extended period of time (around a month), and is the result of a depleted RTC battery. Other symptoms include not being able to execute Windows Update properly, errors/problems executing application software (like Norton Antivirus), and the appearance of the Windows XP "Desktop Clean Wizard".
Resolution This condition is easy to fix in 3 basic steps: Reset the BIOS defaults
Set the correct date and time in Windows.
Charge the RTC battery Please follow the detailed instructions in the next section.
Procedure Set BIOS defaults Press the [F1] key as instructed in the error message:
**** Bad RTC battery ****
**** Bad Checksum (CMOS) ****
Check system, then press [F1] key In the BIOS setup screen press the [Home] key to restore the default values, then press the [End] key to save and exit, then the [Y] key to confirm and restart the system. Set the correct date and time in Windows As Windows starts-up, you may see an error message about an "Invalid System Time". Go ahead and click "OK" to clear the error dialog. Open the Windows Control Panel and open the "Date and Time" control by double-clicking its icon. Set the correct date and time, then click OK to save. Charge the Real Time Clock (RTC) battery To charge the RTC battery, connect the AC adapter and turn the computer on (both the DC IN and Power LEDs must be green). Leave the machine on for approximately 24 hours to ensure a full charge in the RTC battery. Please note that the RTC battery does not charge while the PC is turned off, regardless of whether the AC adapter is connected or not. Other Information: If, on subsequent reboots, the "Bad RTC Battery" error persists, it's quite likely that you actually do have a bad RTC battery. If that's the case, you should contact a Toshiba Authorized Service Provider to have the system serviced. Windows XP Desktop Cleanup Wizard The first time you reboot Windows XP after resetting the system clock, Windows XP may try to run the "Desktop Cleanup Wizard". Simply Cancel the "Desktop Cleanup Wizard" at the first dialog. If you do manage to clean your shortcuts from the desktop and want to recover them, you will find them in a folder called "Unused Desktop Shortcuts". You can recover them as follows: Double-click to open the "Unused Desktop Shortcuts" folder
Click to expand the "Edit" menu, and click "Select All"
Drag the selected items back to your desktop
Close the "Unused Desktop Shortcuts" folder. You can delete this folder if it is empty.

thank u for using fixya

regards,
sivaranjini

Aug 10, 2009 | Toshiba Tecra 730CDT Notebook

1 Answer

System time clock looses time


hello
here is a guide to disassemble the laptop
http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/remove-motherboard-1.htm
Some motherboards have the battery soldered on ,i am not sure if yours is or not ,the batteries usually look like watch batteries.
you could always get a quote from an authorised toshiba support agent if you are uncomfortable opening the laptop.

The information on the hard drive will not be lost as it is saved on the hard drive itself.

May 11, 2009 | Toshiba Satellite A105 Notebook

1 Answer

RTC battery


http://www.irisvista.com/tech/laptops/ToshibaM45/Satellite_M45_disassembly_1.htm

the rtc battery is on the motherboard.i doubt its the problem. If you have a voltmeter check your charger to make sure it is working. then make sure battery is charged with the voltmeter. try and run the system without the battery in, just using the ac adapter. if it works with the ac adapter and not the battery your battery probably needs to replaced as its been charged and discharged too many times. you might want to just reload the os. the link i gave gives disassembly to all toshiba laptops. the rtc battery on the motherboard looks like a watch battery. it should be good for 5 years or more. your laptop battery will go long before the rtc battery.

Nov 01, 2008 | Toshiba Satellite M45-S165 Notebook

2 Answers

CMOS or RTC battery for this laptop : can it be replaced


Hi AshishB, Yes, Toshiba does refer to the CMOS battery in their literature as the real time clock battery. Your retailer is half right, the battery is on the motherboard but its attached via a connector and it can be replaced. Here are links to a couple of venders that sell the RTC battery for your laptop: - Http://www.sparepartswarehouse.com/Toshiba,Satellite,L15-S104,Laptop,Batteries-Backup-RTC.aspx - http://cgi.ebay.com/Toshiba-Laptop-motherboard-battery-cmos-L15-S104_W0QQitemZ170060189842QQihZ007QQcategoryZ3666QQrdZ1QQssPageNameZWD1VQQcmdZViewItem Let us know if you have any other questions and please don?t forget to rate the posting.

Jan 18, 2007 | Toshiba Satellite L15-S104 Notebook

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