HI! All
Should I be worried of the CMOS battery installed in a mobo while measuring ESR? Can something be damaged?
Should I be worried of the CMOS battery installed in a mobo while measuring ESR? Can something be damaged?
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Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller. -
Re: Battery
you should be testing them out of circuit... just to be safe.sigpic
(Insert witty quote here) -
Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.Comment
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Re: Battery
those modules only leak current on a couple of data lines that wont have caps on them - dont worry.Comment
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Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.Comment
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Re: Battery
he means to be safe with the readings.
you cant trust testing caps on the mobo because you will be metering the stuff the cap connects to.
like more caps!!!Comment
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Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.Comment
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Re: Battery
I just tested ESR on all caps on a VP6 I got from my neighbour he found in TRASH(!!!) but left the CMOS battery in the socket while testing the caps, all of the electrolytic ones over the board - thus can I damage some parts on the mobo?Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.Comment
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Re: Battery
Safer to remove CMOS battery when possible but probably won't damage anything if you don't.
Handling and static are more likely to zap the BIOS chip than the meter as long as you are sticking the probes where they, um, should be stuck...
As someone tried to say,
you can't check VRM caps in the board because of parallel paths.
.Mann-Made Global Warming.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
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You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Comment
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Re: Battery
And what happens if I use an ESR meter (particularly PEAK) for example measuring a crystal or a coil, MOSFET, just DOING dumb stuff - can be the board, particular part or the meter damaged this way? or ALL of them?
or for example just connecting the pads to a CMOS battery socket tips?Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.Comment
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Re: Battery
All an ESR meter is is an ohm meter but instead of a small DC volts it uses a small AC volts [usually a square wave].
As long as the equipment is de-energized you aren't going to hurt the meter because the meter is where the voltage comes from.
The voltage is tiny.
The only component you might hurt is one that would be hurt by static.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Comment
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Re: Battery
Alright, but let's see - the only energized part in the whole system when unplugged from the PSU is the connection from CMOS battery to the BIOS chip...can something be damaged when putting a for example voltmeter somewhere to this path, again, doing dumb stuff...imagine a little kid playing with an ESR meter just putting the probes wherever his young heart desires...just imagine this dumb situation - HOW can I damage a motherboard with such instruments - is it even possible? And when you guys measure the ESR of some caps, do you extract the CMOS battery from the board?Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.Comment
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Re: Battery
to be safe, remove the cmos battery - best to fit a new one after anyway.
and far more important, short the caps out with a screwdriver before you meter them.
or you may find one charged with 12v in it!Comment
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Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.Comment
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Re: Battery
How many different ways are you going to ask the same question?
You can't unless you beat the motherboard with the instrument.
You would damage it with static from your hands first.
- Mobo caps have discharge paths. They don't stay charged.
Yes.
Probably not necessary but I and I think most people do.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Comment
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Re: Battery
many times if necessary, PCBONEZ
....
Okay, i think i made my point out...just asking sometimes crappy stuff, but it interests me so much..any other possible destructive ways, guyz?
Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.Comment
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Re: Battery
the most motherboards i see damaged are from the screwdriver slipping as they are removed or the heatsinks unclipped!Comment
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Re: Battery
got a bit astray question : what are the rated voltages of those little MLCC caps? From what values do they range? And the capacitance? I've browsed a lot and found some from 50v to 100v, sometimes the capacitance was not provided.Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.Comment
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Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
-
Comment
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My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?
Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?
My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
I have tried multiple different Dell power adapters. My Dell... -
Hello everyone,
Mark and model: ASUS X571
Symptoms: not turning on. There is only the LED battery indicator working. The owner of the laptop told me this problem arrived one week after having changed the battery. He then managed to power on the laptop only once, and then it never powered on again.
Tests already made:
- Battery is charging when laptop is plugged in. The LED battery indicator turns white after a couple of hours of charge, indicating that battery is fully charged. However, laptop won't turn on anyway, with or without AC plug.
- I have removed...Yesterday, 09:16 AM -
I bought a Vostro 3400 motherboard (LA-K033P) to upgrade over my damaged Inspiron 5593 (LA-J091P) board. Everything else is ok except for the battery. This battery I am using now is already a replacement one since I disposed of the bloated original one. Back in the Inspiron 5593 motherboard, the battery charges fine and is identified just fine. However, with the upgraded motherboard, suddenly the replacement battery is labeled as "Not a dell battery". When I borrow a similar battery from my colleague (which did not have replacements yet), it is identified and charges just fine.
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This problem is based on my experience with an ASUS Z390 Prime motherboard, but it appears to affect other motherboards
as well Install a new CMOS battery, configure computer, turn off computer and disconnect from AC power or switch off SMPS.
Return somewhat later and find that battery is drained, dead, or weak. Clock is wrong, other settings lost, etc.
Examine the power 'sharing' circuit -- when the ATX 3V supply is on, the computer will function normally. The computer is also
configured to support the RTC and some volatile RAM (when SMPS is on). What you may... -
I have a ThinkPad T470 that will not boot when the CMOS battery is plugged in.
With only the fan, a RAM module and a USB-C monitor attached, but no CMOS battery, it starts up normally, i.e. after about 90 seconds and two reboots, it stops with a message to press F1 to enter date & time.
If the power is switched off and a CMOS battery is inserted, it restarts as described above. However, after switching it off and on again, it does not turn on. It draws almost no current and shows no sign of life.
I used a different CMOS battery and checked the components around the battery...
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