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What is the 3 volt battery inside the tower for?

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It's the CMOS battery,

1) http://en.wikipedia.org/wiki/CMOS_battery#CMOS_battery

2) http://en.wikipedia.org/wiki/Nonvolatile_BIOS_memory

Regards,
joecoolvette

[Computer looses time, or date, and general 'misgivings' start happening, suspect the CMOS battery neads to be replaced ]

Posted on Oct 31, 2012

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System battery is low


Dear Anonymous,
BEST PRACTICE: Buy an anti-static wristband before going "under-the-bonnet! Many people will advise that it is ok to delve around the insides of a computer without one, but that can be an expensive mistake...when they only cost a couple of bucks & can save you the trouble & expense of zapping ex$pensive hardware. Your computer box contains extremely sensitive chips & the human body can store up to 50,000 volts of static electricity...
TURN POWER OFF AT WALL SOCKET! [But leave plug in wall socket - this will extend power-system earth to the box.] Then press & hold power-on button on front of box case. (This will "earth" the system.)
Open computer box: Most Dell tower/mini tower boxes have a slider on the back panel: hold slider open & slide side of case backwards.
Find a non-painted - (bare) - metal connection point for wristband alligator clip inside box. Attach clip. {N.B.: if you do this procedure WITHOUT an anti-static wristband, be sure that you "earth" your body, by holding on to the bare metal connection point for a few seconds!} Locate the cmos - (or "BIOS") - battery. It will be a button-shaped battery. Check "Polarity" - (which way up) - of old battery. 'Eject old battery from holder. Check battery TYPE - (make sure that new battery is identical/equivalent. Push new battery into holder. Remove wrist clip. Replace side-cover. Power on. Reboot computer. N.B.: If asked during bootup - restore BIOS settings to "default". That's it! I hope that this solves your problem. Kind regards - 'b'ye - Bruce.

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1 Answer

How do you change the bios battery on my dell workstation 670


Dear Anonymous,
BEST PRACTICE: Buy an anti-static wristband before going "under-the-bonnet! Many people will advise that it is ok to delve around the insides of a computer without one, but that can be an expensive mistake...when they only cost a couple of bucks & can save you the trouble & expense of zapping ex$pensive hardware. Your computer box contains extremely sensitive chips & the human body can store up to 50,000 volts of static electricity...
TURN POWER OFF AT WALL SOCKET! [But leave plug in wall socket - this will extend power-system earth to the box.] Then press & hold power-on button on front of box case. (This will "earth" the system.)
Open computer box: Most Dell tower/mini tower boxes have a slider on the back panel: hold slider open & slide side of case backwards.
Find a non-painted - (bare) - metal connection point for wristband alligator clip inside box. Attach clip. {N.B.: if you do this procedure WITHOUT an anti-static wristband, be sure that you "earth" your body, by holding on to the bare metal connection point for a few seconds!} Locate the cmos - (or "BIOS") - battery. It will be a button-shaped battery. Check "Polarity" - (which way up) - of old battery. 'Eject old battery from holder. Check battery TYPE - (make sure that new battery is identical/equivalent. Push new battery into holder. Remove wrist clip. Replace side-cover. Power on. Reboot computer. N.B.: If asked during bootup - restore BIOS settings to "default". That's it! I hope that this solves your problem. Kind regards - 'b'ye - Bruce.

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1 Answer

Where is the battery on the motherboard of a Gateway SX2370


As you can see the disk standing up to the right of the memory slots.
will be a 3 volt lithium battery like a CR2025 or a CR2532,
The 2025 or 2532 are only telling something about the dimensions. The batteries are always 3 volts.


0abf7b69-ec37-4cd8-8ad7-150ff5e39a94.png

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How to change remote control battery for a Bonaire heater


The remote for Bionaire® 20" Ceramic Mini-Tower Heater with LCD Control uses BUTTON cells (Disc type, 3 volt, CR2025)..
Open the remote as shown in page 4

http://demandware.edgesuite.net/aamb_prd/on/demandware.static/-/Sites-bionaire-ca-Library/default/dw869fb9a8/documents/instruction-manuals/BCH9208-CN_EN.pdf

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1 Answer

Hp computer tower will not go on


Would that be an LED (Light Emitting Diode), blinking on the back of the Power Supply?

If so, instead of being an LED that indicates the Power Supply has power to it, it has now turned into a diagnostic LED (Light), and is telling you the Power Supply is bad.

Do you have an economical multimeter, so I can guide you in testing the 3 low DC Voltages; that come out of the Power Supply?
An economical multimeter can be purchased for as little as $5 to $12.
I have seen them on checkout aisle racks, in major discount stores.

The dangerous high AC voltage, is kept contained within the metal case of the Power Supply.
(100 to 240 Volts depending on what country you are in)

The Power Supply is a Converter.
It converts the high AC voltage into 3 low DC Voltages;
3.3 Volts, 5 Volts, and 12 Volts.
In comparison two D cell flashlight batteries produce 3 Volts DC.

OR;
Use a KNOWN to be good, Compatible power supply; for a temporary test unit.

{"Honey, I'm going to borrow the Power Supply out of your computer.
I'll put it back when I'm done."
"What? I'll be sleeping on the couch? K"} (Lol!)

Also, is the inside of the computer dirty?
(Computer Unplugged from power, Anti-Static Procedures FOLLOWED)

Let's start here......

Also, what is the Product Number?
Back of computer tower, white Service Tag.
P/N = Product Number


Post back in a Comment.
Regards,
joecoolvette

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2 Answers

HP Presario Replace backup battery


if you mean the bios battery that saves your clock information, that is located on the motherboard by pushing the click located on the side you will be able to release the battery, they are mostly the type CR2032, check the size before buying...

Regards

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1 Answer

Please what the adaptor output volt of the graco weestpeaceswinger


The manual shows the tower batteries hooked in series. They are LR20 1.5v batteries so the adapter is 6 volts. By the way, when the adapter is being used the batteries are automatically disabled

You can get the manual at this website (if needed):
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1 Answer

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Hi:
Your compaq mini tower has a coin type battery that is mounted to the motherboard that keeps the time and date. It usually is a cr2032 , but you need to take the side cover off of your tower, with the tower unplugged, and locate the battery. take note of how it is installed. It is a 3 volt lithium battery that you can buy at most stores for about $2-3 and is easy to swap out.
Give it a try, and your computer will remember after you reset everything!

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1 Answer

My presario sr1820nx won't turn on, on the back of the power supply the green light just blinks? Is the power supply screwed or what?


I don't know, but the CMOS battery would be a good place to start, inside the tower...check to see it it has 3 volts or not.

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1 Answer

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on the fan nameplate does it state 220 volts or 110 volts? there are no fuses inside. this is a good place to begin...

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