Monitor does not go on! Can you help me fix it?

HappySad

My flat screen monitor does not go on. I have to remove the power lead and leave it for a minute or two then try to switch it on. Sometimes I have to press on and off the power on button several times for the screen to go on.

Do you know what I can do to get it fixed?

macman

Make and model would help. But if the power button is faulty, then fixing it is probably not economic-all you can do is leave it on standby or switch it off at the socket, or replace the monitor.
Have you tried swapping out the main lead and graphics cable to see if they are the issue?
Have you checked to see if there is power at the socket only intermittently?

spannerzone

Often it's not the actual power button but a power supply fault and repeatedly pressing the button just happens to force it to work. I had a Samsumg monitor that needed about 20 presses to power up and then it was fine. Fault was a few electrolytic caps gone bad in the power supply (not really a DIY fix though)

However I did have a Dell 17" LCD where the power button was the fault, or rather the plastic button the you pressed, the plastic was an angled flimsy thing that after a while broke and no longer pressed the actual power button tact switch. Quite common on Dell's apparently.

espresso

HappySad wrote: »

Do you know what I can do to get it fixed?

Any decent electronic engineer if you can find one, will be able to diagnose and repair your monitor but I don't know how much they would charge you.

See the crosses on the top of these capacitors. The two turquoise ones on the left are fine and have flat tops, whereas the three on the right have failed and have bulged tops.



After the failed capacitors have been replaced the monitor now works fine again for less than a pound and a few minutes of my time.

SailorSam

Thanks espresso, i replaced my monitor when it happend to me, but i've still got the old one so i'll check to see if it can be fixed and keep as a spare.

HappySad

spannerzone wrote: »

Often it's not the actual power button but a power supply fault and repeatedly pressing the button just happens to force it to work. I had a Samsumg monitor that needed about 20 presses to power up and then it was fine. Fault was a few electrolytic caps gone bad in the power supply (not really a DIY fix though)

However I did have a Dell 17" LCD where the power button was the fault, or rather the plastic button the you pressed, the plastic was an angled flimsy thing that after a while broke and no longer pressed the actual power button tact switch. Quite common on Dell's apparently.

I am going o take it in for repair. I think what you said might be the fault as the button needs several presses or sometimes just one press to power on. Hope it does not its too much 2 fix as I don't really want to purchase a new on.

Ratboy

HappySad wrote: »

I am going o take it in for repair. I think what you said might be the fault as the button needs several presses or sometimes just one press to power on. Hope it does not its too much 2 fix as I don't really want to purchase a new on.

2nd hand 19" LCD widescreen HD monitor from computer fair/cash convertors/ebay £30-£40....

Repair costs per hour??? Probably £25 min? plus parts.

I repair these, could be the caps as stated above, but they are dangerous to handle, can store upto 600V DC even when monitor switched off/unplugged.

Possibly the invertor, or flo tubes that have gone.

Are you sure it's not a fault with your computer/video card? Try the monitor unplugged from computer, and see if you get the test screen showing. Does the power light illuminate when power applied, does it flash? Does it show steady then slowly fade? If you turn the brightness all the way up, can you see a faint picture?

HappySad

Ratboy wrote: »

2nd hand 19" LCD widescreen HD monitor from computer fair/cash convertors/ebay £30-£40....

Repair costs per hour??? Probably £25 min? plus parts.

I repair these, could be the caps as stated above, but they are dangerous to handle, can store upto 600V DC even when monitor switched off/unplugged.

Possibly the invertor, or flo tubes that have gone.

Are you sure it's not a fault with your computer/video card? Try the monitor unplugged from computer, and see if you get the test screen showing. Does the power light illuminate when power applied, does it flash? Does it show steady then slowly fade? If you turn the brightness all the way up, can you see a faint picture?

I will try out your tests. Thanks

The monitor is a Samsung 933HD

macman

How old is the monitor and what is it worth? Make and model? Monitor repairs are rarely economic unless you can DIY.

HappySad

macman wrote: »

How old is the monitor and what is it worth? Make and model? Monitor repairs are rarely economic unless you can DIY.

It's very old as I got it second hand from a friend. The monitor is a Samsung 933HD

macman

That is a 19" TV, not a dedicated monitor. very unlikely to be worth repairing.