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Computer resets with Power cuts not always although UPS supplied

My computer resets when power goes or comes. It doesn't happens always. Power Supply comes through Two UPS one bigger with external battery with which other electrical components are also attached and then through smaller 600 Watt Hours. Computer Configuration is as :- 1. Intel P4 with D865GSA motherboard. 2. Two harddisks hitachi 80GB IDE and WD 500 GB SATA. 3. LG DVD Rom IDE 4. Front USB 5. Canon Scanner CanoScan LiDE 25 through USB (Power also USB) 6. Canon LBP3000 Printer through USB power externally. 7. CRT Monitor 8. UPS Microtech This unknown computer reset often destroy most of work currently doing on PC. Please provide a solution.

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Ups may not be true on line, type so sometimes when power outage happens there can be a very small break in supply. this can cause load items to shut down
get good quality on line ups.

Posted on Sep 15, 2009

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Posted on Jan 02, 2017

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Screen Philips 17 inches LCD doesn't react. Power LED stays off.


Check the tv power supply board,that board where the power a/c cord plug into it.Most common problems on these power supply board are dying and leakages capacitors components parts.Check the power supply board carefully,if u have dying or leakages capacitors parts,these capacitors parts will bulges ups,will not have a flat cylinder heads like the rest of the other capacitors coponents parts.Replaces all these dying and leakages capacitors parts with the same Miro fared and the voltages little higher like 5 to 10 volts higher,the power supply board should not have this problem again.U have all equipments to do basic soldering works and u understand basic electronic wright?Then u should have no problems by replacing all of these dying and leakages capacitors parts that are bulges ups onto it cylinder heads on the power supply board.If u can't do this,tries websites like Shopjimmy.com,eBay.com to by a whole new refurbish power supply board for the replacement.

Aug 22, 2012 | Computers & Internet

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Benefits of a UPS (Uninterrupted power supply


We all use many devices and equipments that run on electricity. For all these to function properly they need uniform power supply (constant flow of electricity). As the electric supply in many countries is not uniform there is a need for a device to correct it. There are many such devices available in the market today. For example UPS (Uninterrupted power supply), Voltage Stabilizer, Constant Voltage Transformer are such devices available today.<br /> <br /> <b><u>Why buy a UPS?</u></b><br />We can never guarantee that we will get constant power. The power supply always has fluctuations. Surges, Spikes, Brownouts, Blackouts and Noise can damage your electrical appliances especially your computer. To prevent this from happening you need a device that does power conditioning. Electricity has to be uninterrupted. If the voltage is higher than the specified level then it is 'Over Voltage'. If the voltage is lower than the specified level then it is 'Under Voltage'. Both Spike and Surge come under 'Over Voltage' category. But there is a small difference between spike and surge. If there is very high voltage for an instant but comes back to normal immediately then it is called 'Spike'. If there is very high voltage for a slightly longer period then it is called 'Surge'. If the voltage is dangerously reduced to very low within a short period of time then it is called 'Brownout'. When this happens, the computer can be seriously damaged. If the power supply is totally cut then it is called 'Blackout'. Noise can mix with electromagnetic or radio waves or any signals. This is called 'Line Noise'. This may also reduce the voltage level to very low within a short period of time.<br /> <br /> <b><u>How can the UPS provide power when the main electrical supply is cut?<br /></u></b>A UPS has an internal battery. With this battery charger, an Inverter is also present. The inverter converts the 'Direct current' supplied by the battery to 'Alternatinc current' as required by the computer. When there is electrical supply the charger in the UPS charges the internal battery. When there is a power cut, the battery kicks in to supply the DC which is converted to AC by the inverter and power is supplied to computer.<br /> <b></b> <br /> <b><u>What if the battery loses its power?</u></b><br />When there is power cut, the required power is taken from the battery. Therefore the battery keeps losing its capacity. If the power supply comes back before the battery is depleted then the battery charger will start recharging, but if the power supply doesn't come back then the battery keeps supplying until it totally drains out. When the battery drains below a certain level the UPS sounds an alarm for your to shut down your computer and turn off the UPS. Some UPS' even have a built in system that shuts your computer down for you after a certain amount of UPS uptime.<br /> <b></b> <br /> <b><u>How long can the UPS provide power when there is a blackout?</u></b><br />This all depends on the specifications of the UPS and the requirement of the computer. A 600vA UPS for example can supply power to a computer with a 550W power supply for about 10 minutes or more.<br /> <b></b> <br /> <b><u>Tips for buying an UPS</u></b><br />The backup time of your UPS is the most important you need to consider. Other than that, you should know how many KVA (Kilo Volt Ampere) your UPS has. A computer needs atleast 0.5 KVA (500VA) to function. If you are planning to connect more than one computer to a single UPS then you need to get one with a higher KVA.<br /> <b></b> <br /> <b><u>What type of battery does a UPS use?</u></b><br />UPS uses <b>SMF</b> batteries (Sealed Maintenance Free). These type of batteries can be used for 5 to 7 years continuously.

on Mar 05, 2011 | Computers & Internet

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UNINTERRUPTIBLE POWER SUPPLY


UPS – UNINTERRUPTIBLE POWER SUPPLY
Uninterruptible power supplies provide protection against mains power faults to computer equipment.
These faults include voltage spikes/interference, over voltage and under voltage, mains supply interruptions and surge protection etc.
These faults can cause computer and electronic equipment that are connected to an unprotected mains supply to malfunction and/or sometimes fail.
A common problem, when burning Cds, DVDs etc. any slight power interruptions to the burning process will halt the recording process and rendered the disc useless.

There two type of Uninterruptible Power Supplies
The lower powered and cheaper type UPS are switch-over types, when the mains supply fails, the UPS switches over to the batteries and inverter in milli-seconds which then supplies mains power to the computer and peripherals. A faulty inverter circuit and or flat batteries won’t deliver standby power when the mains supply fails.
NOTE : The mains waveform from these UPS is a pseudo sine wave (i.e. not a true sine wave).
The true UPS types are usually the higher KVA units (over 1500 VA) that supply continuous mains power. The mains power is connected to a charger which charges the batteries and then the inverter draws power from these batteries and converts it to true sine wave mains power to the computer equipment, therefore there is no switch over time lag when the mains supply fails.

on Dec 06, 2009 | Computers & Internet

2 Answers

Hai sir my ups suddenly switched off when power cut ,can i know what is the problem here?


Probably bad batteries depends how old the UPS is. Many battery stores can replace those batteries for you as well. Could be cheaper than buying a brand new one.

Feb 28, 2011 | IBM Power Supply 300GL (UPSIB101) Power...

1 Answer

I have a Dell Dimension 5100, after a power outage yestarday, the computer doesnt want to turn on. there is a green light in the motherboard that stays green for as long as i have power conected to the...


The greenlight is probably the UPS [Uninterruptible Power Source]. If the computer was shut down by a normal windows shutdown and the UPS remained plugged into the 120 Volt line and the computer's power supply plugged into the UPS and the UPS NOT turned off, there would still be 5 volt standby voltage applied to the computer's motherboard. ATX type computers never go completely off unless the power supply is turned off or unplugged.
That 5 volts would have to on steadily for the rest of the voltages from the supply to turn on.
If there is a reset button or on off switch at the back where your power cord plugs in toggle it back and forth. You can also try disconnecting the power supply and holding the power button in for about 15 seconds to discharge power.Leave it unplugged for a few minutes. Then try powering it back up again. If those don't work then you might have a bad power supply. They are not hard to replace.
Hope it helps

Nov 20, 2010 | Computers & Internet

1 Answer

Computer will not come on when you press the power button after a lightening storm


First check the outlet, power strip, UPS etc. that the computer is plugged into. Many devices have a circuit breaker that will need to be reset after a power surge. Once you establish that you're getting power to the computer, check the power supply on the back of your computer - next to the power cord connector. Many power supplies have a fuse or circuit breaker. If there is no reset function or fuse then you will need to replace the power supply. These are inexpensive, simple to replace, and easy to find on sources such as eBay and Amazon.

I hope this helps.

Bill B

Aug 04, 2010 | Dell Dimension 4550 PC Desktop

2 Answers

How to charge ups for pc's


Your PC connection must always come via UPS, and your UPS will always keep charging.

UPS Power cable should be connected to DC, and your PC power cable should be connected to UPS.

And this way your PC will always be safe.

Nov 06, 2009 | QVS NetStar (UPS650A) UPS System

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Ups only puts out 80 volts when power disconnects


These type of UPS's put out a simulated sine wave on battery power. When you test these with a regular voltmeter, it tries to read it as a pure "rounded" sinewave and will nearly always report 80 volts, instead of 120 volts. If you test it with a true RMS voltmeter you'll see that it is 120. Otherwise, these units are getting older and the batteries need to be replaced every 3-4 years. Here's a link to a replacement battery: http://www.batteryinternational.com/cyber-power-cps585avr-ups-battery-ups-batteries-f1.html

Sep 22, 2009 | CyberPower Office Power 585AVR...

1 Answer

NO power


there may be some loose contact in the power supply cable or the short circuit might have occurred in power supply cable or there may some cuts in the middle of it ...just have check with it ..

if there is some short circuit in the power supply cable then you check for the hole or burnt marks on it if so you must change the power supply cable of the monitor ...

if there are some cuts in the middle of the power supply wire internally then it may not be visible if so you must check the power to the monitor motherboard and then identify it and you must replace the power supply cable ...

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