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Thread ID: 136129	2014-01-22 08:46:00	HP desktop PC - losing system clock	Nomad (952)	Press F1

Post ID	Timestamp	Content	User
1365822	2014-01-22 21:32:00	I have tried a different clock battery. An old computer, nearly 10yrs I suppose. This battery works in my own PC fine. Have you tried a BRAND NEW, fresh out of the packet CMOS batt. Dont assume that a batt with (just) enough volts for 1 pc will have enough volts for the other PC If a new batt doesnt work, it will be a motherboard issue, on a 10year old PC that will not really be fixable.	1101 (13337)
1365823	2014-01-22 21:50:00	Was going to suggest that as well,all CR2032 are not the same stick to the well known brands that have a good turnover at the place you get them Got some once from dx Extreme for other stuff,not good	Lawrence (2987)
1365824	2014-01-22 21:50:00	Have you tried a BRAND NEW, fresh out of the packet CMOS batt. Dont assume that a batt with (just) enough volts for 1 pc will have enough volts for the other PC If a new batt doesnt work, it will be a motherboard issue, on a 10year old PC that will not really be fixable. Just bought a brand new Panasonic 2032 at Countdown supermarket for $4.65 this morning. No can do. Boots up does the long full RAM check, I set the time and date adn select save and exit. It goes into XP Windows and doesn't tell me about the system clock - the date and time is correct in Windows. I then shutdown and turn off at the wall. Power up again and it does the RAM check again and says my time / date is not set and that my previous configuration is not available and it has assigned me a new setup - ie the HDD layout. Might have a look at the settings but it doesn't bother me - auto start when turned on at the wall ... I have disabled wake on lan and with the mouse.	Nomad (952)
1365825	2014-01-22 23:53:00	Have you checked that the battery, when installed in it's holder, is actually making electrical contact with the motherboard?	jinja_thom (4306)
1365826	2014-01-23 03:54:00	It looks like it is, I gave contacts a tug with a small screwdriver and put the new battery in - but same thing . I used my multimeter . If I set it to "DCV 20" mode I get 0 . 11 . "200 Ohm" I get 0 . 00 . "V 200" I get 00 . 1 .	Nomad (952)
1365827	2014-01-23 06:32:00	Well there is something seriously wrong with your meter or the battery is flat or not making contact with tags or a short circuit on the motherboard. Do not measure volts on the ohms range, you will be alright in this case because the voltage is low. Measure the battery out of circuit, it is nominally 3volts, if it's ok then put into place and try to measure the voltage in circuit, it should be the same as you measured out of circuit.	zqwerty (97)
1365828	2014-01-23 06:37:00	the above were the motherboard battery contacts without battery with computer on. the new battery by itself outside is 3.28v	Nomad (952)
1365829	2014-01-23 07:02:00	new battery in circuit measures 0.00v. the side contact battery lever for negative and positive on the top of battery	Nomad (952)
1365830	2014-01-23 08:10:00	That side clip contacts the rim which is + so no wonder you read 0 volts. You will have to access some point that is connected to the centre contact under the cell.	linw (53)
1365831	2014-01-23 09:44:00	You need to do this in a professional way, do not short anything to anything else by being careless with the probes. My guess is inside middle contact corroded by leakage from last battery. If so clean up with small metal file, (or scrape with scalpel) not emery paper, put drop of contact cleaner on cleaned contact, try again, you may have to repeat in future as once plating gone there are often contact problem. Once you are sure that the problem is repaired, take steps to replace battery holder if you have the skills to unsolder/replace/re-solder.	zqwerty (97)
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