RTC battery The main battery is charged and working. The laptop boots up to the point where Windows loads and the Desktop is displayed. Then I am unable to start any of the programs. The clock has been slow for a long time. When I display the BIOS screen at start-up it shows a checksum error on the internal clock. I select F1 for the default settings and have been able to re-set the clock (I was actually able to restart on one attempt) but then it freezes again and the only way to power off is to remove the main battery. Have been advised that it may be the RTC battery but I don't know where to locate it on the laptop to replace it. Cannot find an internal diagram on the Toshiba site to locate it and not sure if this is the problem anyway. Any help appreciated.

found it in a garage sale for $1?
sure, it's old, and all old PC's die, lucky you the screen still works at all. (most do not)
HP Pavilion dv6000 with horrible XP operating system, (virus magnet)
16 years old today, no hdd or battery lasted 16 years.
the main large battery is dead. that old, so leave it out, run on AC power only until PC works right.
next is that very dead RTC CMOS coin cell battery dead., this makes BIOS go crazy, and fail hard.
when that fails it can not boot. the boot hDD , harddisk boot order is gone, in BIOS page of same name
F11 will not work right if any things above bad.
The HDD this old is no good.(that old)
so it did no run for 16 long years and fail just not out of the blue.
I bet it did not (unless serviced fully every 3 years)

RTC battery is under bottommemory hatch
page 127

https://www.manualslib.com/manual/1031591/Hp-Pavilion-Dv6000.html?page=127&term=rtc&selected=1#manual

after a new battery (coin + pig tail type)
f10 is the hot key for bios (power on , hammer F10)

1. bios page 1 set time and date.
2. set bios defaults.
3. set PXE to disabled where seen.
4. set boot order to hdd first.
5. save
6. exit bios, and cold boot PC and see HDD fail. as all do this old.

any PC shop can fix this, why not do that?

NO PC stated just HP.
NO OS stated, but
All PC boot in SERIAL order. until if windows, windows loads.
ok?
so how far it gets into that process, is key the cause when it fails.
First I must assume the screen works, is this desktop or laptop(notebook).
if the PC is not older that 10 years old the HP RTC coin cell my be good. so you power on, and the BIOS message happens
and you hit the key "hit ESC to enter HP setup" as seen every day you owned this PC. you hit ESC (or what it says to do , F10,or>?)
and you get the bios screens.
Test 1 does it show the correct time and date. if not the coin cell is dead. RTC means real time clock, . and has battery.
test 2, do you get to Windows login screen, next?
or are you stopped by the painful BIOS PASSWORD screen.
Ill stop here. as I cant see your screen , its progress nor all errors on the screen.

those are POST code, error codes, you need to watch time and count them. report them.
leave the battery main out.
does it run ok now? yes/no.? main battery out?.
even new cheap batteries fail easy and hard and short out.
test it with no main battery. it can run on AC power for ever.

are you going to run the COIN cell RTC battery for 10 more years.
it wont make it..
this PC is 10 years old today (can be) so is RTC battery end of life. most fail in 5 to 7 years, says the pink bunny. (and is correct)
the manual shows how to replace it at the real HP Site,
fixya is not hp, not at all.

page 63 shows the way to the RTC

http://h10032.www1.hp.com/ctg/Manual/c01918142


if you power on the PC, and hammer the f10 key]
BIOS runs, its menus;
check the time and date here, if wrong the RTC battery is dead.

read page 3 how.
http://h10032.www1.hp.com/ctg/Manual/c01662442

• old PC have many points of failure (endless it seems)
• does the fan run? is it packed in lint, as all are this old.?
• causing it to overheat?
• RTC coin cell bad.
• main battery bad. (just leave it out until the PC runs right again)
• power pack wires broken, or running real hot.
• HDD going bad,
• windows infected?, no OS stated but avoid XP.

HP caps lock POST blink code page is a horror of horrors
no 2008 listing, to name one flaw (2011 and newer sadly)

https://support.hp.com/us-en/product/hp-pavilion-dv7-1100-entertainment-notebook-pc-series/3756677/model/3807256/document/c01732674



here is a old post at HP, one guy 3 year ago said

LEDs blink 1 time
CPU
CPU not functional
LEDs blink 2 times
BIOS
BIOS corruption failure (RTC coin cell dead)
LEDs blink 3 times
Memory
Module error not functional
LEDs blink 4 times
Graphics
Graphics controller not functional
LEDs blink 5 times (or RTC dead)
System board
General system board failure
LEDs blink 6 times (or RTC battery dead)
BIOS
BIOS authentication failure

Critical battery switches off the wireless network card to preserve power. Motherboard seems to log this status but when re-connecting to mains power the card does not receive power again. Uninstalling the driver and getting Windows to re-install automatically upon re-boot does not work.


Charge up the battery whilst the computer is running. You can charge it to a substantial level, say, above 25%. Disconnect mains power so that your laptop is running on battery only. Set your wireless switch to OFF (this is usually to the left position, away from the orange indicator). Now run your computer down to the critical battery level again (perhaps overnight). In the morning when you press the power button, the 'CHARGE' indicator (looks like a lightning bolt) on the front of the laptop should flash quickly, indicating that there is no charge in the battery. Remove the battery from the laptop's underside. Wait a couple of seconds, then press and hold the power button for 30 seconds. Keeping the battery off the laptop, reconnect mains power. Boot up your PC. When at the Windows desktop and all your startup programs have finished loading, switch your wireless on (to the right position). You should now have a blue light, and wireless should once again be working. You can now re-insert your battery. You might have to setup your wireless network connection again as mine seemed to be 'lost', but at least hopefully the main problem is now fixed

Try this

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=au&prodTypeId=321957&prodSeriesId=4097214&swItem=ob-83668-1&prodNameId=4096169&swEnvOID=1093&swLang=13&taskId=135&mode=4&idx=4

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

That means that after computer had been off for a long time the CMOS battery has drained, and CMOS (BIOS) settings had been reset to default.

Usually the computer will work fine after pressing F1, but you may get wrong date and time.

Try charging battery completely, often the problem disappears, if it does not , then the choice is between pressing F1 each time you start the laptop, or disassembling the laptop and replacing CMOS internal coin battery, located on the lower side of the motherboard.

Replace Battery.

Matt Sydney Aug 4, 2008 00:28:44 GMT 10 pts
I experienced this problem last night, and seemed to have fixed it this morning.

SYMPTOMS: HP Pavilion dv9000, Win Vista x64 Ultimate. Running on battery, battery level became critical; windows went into 'Hibernate' mode. Upon plugging in to mains power, and resuming the Windows session, the Wireless is still disabled, no matter what position the switch is in.


POSSIBLE CAUSE: Critical battery switches off the wireless network card to preserve power. Motherboard seems to log this status but when re-connecting to mains power the card does not receive power again. Uninstalling the driver and getting Windows to re-install automatically upon re-boot does not work.


SOLUTION: Charge up the battery whilst the computer is running. You can charge it to a substantial level, say, above 25%. Disconnect mains power so that your laptop is running on battery only. Set your wireless switch to OFF (this is usually to the left position, away from the orange indicator). Now run your computer down to the critical battery level again (perhaps overnight). In the morning when you press the power button, the 'CHARGE' indicator (looks like a lightning bolt) on the front of the laptop should flash quickly, indicating that there is no charge in the battery. Remove the battery from the laptop's underside. Wait a couple of seconds, then press and hold the power button for 30 seconds. Keeping the battery off the laptop, reconnect mains power. Boot up your PC. When at the Windows desktop and all your startup programs have finished loading, switch your wireless on (to the right position). You should now have a blue light, and wireless should once again be working. You can now re-insert your battery. You might have to setup your wireless network connection again as mine seemed to be 'lost', but at least hopefully the main problem is now fixed.



Jamie Madriz Aug 8, 2008 01:58:15 GMT N/A: Question Author
Matt, i did what u said, and i'm happy because my wireless switch is WORKING! :) Hopefully it stays this way.

Forget the non-sense.

1. Remove the battery
2. Open the RTC Battery compartment
3. unplug the RTC battery
4. Press the power button to dissipate stray voltage
5. Re-install RTC battery and cover
6. re-install main battery
7. Re-boot and enter set-up to change date time etc.