Question about HP Pavilion A520n (DW233A#ABA) PC Desktop

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I turn on my computer and the power comes on with the fans. nothing else happens. The normal startup proceedures (sound in the drives as they cycle) doesn't happen. I tried hard boot, remove plug and press power button. But still nothing. I left it on for over 12 hrs to see if anything might = nothing (but a silly blue light on the front and fans buzzing in the back). Any help would be great.

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Unplug the power cable, and remove the bettery from the mother board, and the ram 2, wait for 5 minutes then try again...hope it will help

Posted on May 11, 2010


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Hp pavillion t660a... when i turn power on the light flashes a few times like it would as if it was going to startup normally, then everything goes neutral and nothing happens. is this a motherboard p

It sounds like your computer is in sleep mode or hibernation mode. remove the battery and unplug it from the wall wait a few seconds and try again. If it does it again press the sleep button on your keyboard. Also make sure no flash drives or cds are in the computer during boot up.

Oct 04, 2012 | HP Computers & Internet

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Toshiba Portege r200 was working normal (up until yesterday). Today, when I first turned it on, the fan was on and it sounded full blast, but screen remained dark (blank). I held power button until it shut...

The part that supplies the power to the screen is gone. I recall is is called the 'exciter'. They can be replaced, so take it to a computer repair shop. Same thing happened to my Toshiba.

Aug 18, 2017 | Toshiba Portege R200 Notebook

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Engine fans come while driving then after a little while they go off and that happen every so often.

This should be normal operation of the fans they do not run all the time as most people think as the engine temperature increases the fans will come on to help cool down the engine once the temperature decreases then the fans will cut off and it will continue to cycle that way there is nothing wrong with that its normal. You will notice however that when you turn on the A/C the fan will turn on and stay on till you turn off the A/C this is also normal some vehicle have two fans one for the A/C the other for engine cooling unless your engine is getting too hot then they will both come on but normally one is for the engine cooling the other for the condenser A/C and this one will only come on when the A/C is running.

Dec 23, 2010 | 2004 Lincoln LS

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The tv won't turn on.


TVs and monitors usually incorporate some kind of startup circuit to provide drive to the horizontal output transistor (HOT) until the flyback power supply is running. Yes, TVs and monitors boot just like computers.

There are two typical kinds of symptoms: power on click but nothing else happens or a tick-tick-tick sound indicating cycling of the low voltage (line regulator) but lack of startup horizontal drive.

Check the voltage on the horizontal output transistor (HOT). If no voltage is present, there may be a blown fuse or open fusable resistor - and probably a shorted HOT.

However, if the voltage is normal (or high) - usually 100-150 V, then there is likely a problem with the startup circuit not providing initial base drive to the HOT.

The startup circuits may take several forms:

Discrete multivibrator or other simple transistor circuit to provide base drive to the HOT.

IC which is part of deflection chain powered off of a voltage divider or transformer.

Other type of circuit which operates off of the line which provides some kind of drive to the HOT.

The startup circuit may operate off of the standby power supply or voltage derived from non-isolated input. Be careful - of course, use an isolation transformer whenever working on TVs and especially for power supply problems.

Note that one common way of verifying that this is a startup problem is to inject a 15 kHz signal directly into the HOT base or driver circuit (just for a second or two). If the TV then starts up and continues to run, you know that it is a startup problem. However, this is a risky procedure for both you and the TV.

I have also seen startup circuits that were designed to fail. Turning the TV on and off multiple times would exceed the power ratings of the components in the startup circuit. Some Zenith models have this 'feature'.

When this situation exists, it could be that the circuit is not providing the proper drive or that due to some other circuit condition, the drive is not always sufficient to get the secondary supplies going to the point that the normal circuits take over.

You can still check for bad connections - prod the circuit board with an insulated stick when the problem reoccurs.

Jun 02, 2010 | Apex Digital GT2715DV 27 in. TV/DVD Combo

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Our computer has had a problem which started with the screen turning into power save mode. Computer has been away and we are told it works perfectly now but when we plug in the screen starts up with LG but...

Have you tried another monitor on the computer to see if the computer is working? When you turn the computer on, do you hear the sounds of normal startup (usually a beep from the computer, then hard drive activity with blinking lights on the front panel, and finally the Windows startup sound through your speakers)? If you do, the monitor may have internal problems, there might be a broken wire in the cable from the monitor to the computer, or a bent pin in the plug at the end of the cable. If the monitor turns out to be the problem, just replace it. It's tough to find anyone to do monitor repairs, and the low cost of LCD monitors today makes it uneconomical to repair them anyway.

But if your computer is still having problems starting up, the monitor will come on, show you that LG logo and then blank out. It's not actually turning off. This isn't happening before anything starts; it's because nothing is starting. The computer's not booting up and there's nothing for the monitor to display. If the computer still at fault, contact whoever it went to for repair. Find out what they did and let them know it's still not right.

ope this helps you straighten things out. Thanks for using Fixya!

Mar 31, 2010 | LG Flatron Ez T910BU 19" CRT Monitor

2 Answers

I have a Presario SR1950NX that is not booting. After turning on power, the fans come on and the DVD drive flickers, then nothing else happens. The keyboard and maonitor stay dormant. Normally, a loud fan...

It may be the clogged fan that caused this problem then resulted to overheat. possibly you need to replace the motherboard. or first, try using a bootable cd to boot your pc up. it may also be an issue with your hard drive not booting up.

Mar 29, 2010 | HP Compaq Presario SR1950NX PC Desktop

1 Answer

Signal has gone

If the monitor comes on and displays a message like "no input signal" or something similar, it's working properly but there is nothing coming from the computer. People often think that the computer is working and the monitor is at fault, when in fact the computer isn't starting up.

When you turn on the computer, do you hear the normal sounds of the power supply fan running and the hard drive spinning? Most computers will give a beep when they turn on and the motherboard finishes some startup checks. Do you hear that? Do you ever hear the normal startup sounds that mean Windows is actually running?

If you are convinced the computer is starting and booting into Windows, I would suggest you borrow a known good monitor to use as a test. If it works, that obviously means yours is bad. In most cases there's nothing you can do to repair a monitor yourself beyond checking for loose connections, bent pins in the signal cable plug, or a damaged cable.

If a known good monitor still has no image, the computer is at fault. Either the video card or integrated video isn't working, or the computer isn't actually starting up. In any case, that's where you would need to start looking for the cause.

Hope this helps you along the way to solving the problem. Thanks fo using Fixya!

Feb 02, 2010 | ViewSonic VX2235WM Monitor

3 Answers

My computer is not turning on properly!

You mentioned the fan coming on and the drives making a few sounds and you also mentioned a floppy drive, a CDRom Drive and a DVD drive but you did not say whether or not the computer has a processor or hard drive with an installed operatings system.

If it does have a hard disk w/installed operating system and it does have a processor installed on the mother board, there are a couple of simple things you might want to check. They are simple but sometimes the simplest of things can create major problems.

1. Check to see if the hard drive's power cable is connected. If it is, unplug it from the drive and then plug it back in.

2. Check the hard drive's data cable. Is it attached to both the hard drive and the motherboard. If so, unplug it at both ends then plug it back in.

3. With only 128 meg of RAM, in a normal configuration it will have either one 128 meg chip or two 64 meg chips. Either way, remove the RAM chip(s). If it has only one chip, simply remove it and then plug it back in. If it has two chips, you probably should remove both chips and then reinstall them one at a time and try booting the computer with each stick individually. One word of caution however - if you are new to computers, you want to be very carefull not to let the RAM chip(s) get damaged by static electricity. Turn the computer off but leave it plugged in. Before attempting to remove the RAM chip(s), touch a bare spot somewhere on the case to discharge any built up static electricity from your body.

If you are still having problems after performing the above checks, there are several other things that could be wrong with the computer. The hard drive could be bad, the motherboard could be bad, the power supply could be weak or bad - or any of a number of other components could be bad. If that is the case and the computer is very old, you will probably be better off just junking it and picking up another one.

Hope that helps - Graye

Nov 08, 2008 | Microsoft Office Professional 2007 Full...

1 Answer

Monitor problem.

This just happened to me last night.  My web research indicates that the monitor is bad...others have had the exact same problem. 

Oct 25, 2007 | Gateway FPD 1730 17" Flat Panel LCD...

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