Electronic Circuits and Projects Forum

26th April 2010 07:47 PM

Hello,

I have this great monitor that I spent alot of money on and only been using it a few months. I used it last night, working perfectly, turned it on today and I now have a shadow gradient running from about the centre to the top. Its gets darker as it reaches the top edge. (top half of screen is about 50+% dimmer than the bottom half.)
I thought perhaps it might be a backlight issue, Its not my windows as I unplugged the video dual cable to bring up the test colours screen and the shadowing remains.

Obviously my warranty just expired last month (typical).

Im not sure if its that actual light or the backlight inverter, as stated im a noob and only learned about this stuff today.

I mocked up pretty accurately how it looks, the top image is how it should look and the bottom is how mine is now.

Many Thanks

Steve

ps having a string of bad luck as my pc fried my video card, psu and mobo 2months ago, had to replace it all luckily my hard drives were fine.

CaptchaTrader · 26th April 2010 08:21 PM

This must be a backlight issue. Usually there are two small compact-fluorescent tube bulbs behind the screen. One at the top, one at the bottom.

Obviously your top bulb has burnt out. If you open up your monitor , you should be able to find the bulb. Then it's just a matter of taking out the old one, and putting in a new one.

26th April 2010 08:31 PM

Thanks for replying, do you know where i can find out which one and size i need and roughly the cost of one. My monitor is 30". Would there be any soldering involved.

Cheers
Steve

ps Im based in UK.

CaptchaTrader · 26th April 2010 08:46 PM

The model of the LCD monitor will be needed to find a suitable replacement. There shouldn't be any soldering involved, as the fix is as easy as changing a tube-style light bulb.

EDIT: OOPS! I see you included your model in the title... Give me some time to find a suitable replacement!

CaptchaTrader · 26th April 2010 10:13 PM

OK - I have been searching for a while and can't find a bulb that will work in your monitor. I know it's out there, but locating the correct model is hard. It seems like they are a lot easier to find for laptops, not separate LCD monitors...

With some monitor set-ups, you WILL have to de-solder the old bulb, and solder in the new one. (Just so you know!)

Maybe some of the more experienced tv / lcd / monitor guys can help out?

26th April 2010 10:48 PM

thanks for helping, hopefully someone will know where i can get one. I'll try calling some repair shops.

cheers
steve

27th April 2010 08:02 AM

Originally Posted by 3dSteve

thanks for helping, hopefully someone will know where i can get one. I'll try calling some repair shops.

To be honest the replies seem a little over optimistic? - it's usually a complete strip down and rebuild job of the LCD panel, which is supposed to be done in a clean room. It's also not very easy to source CCFL's for them, but tube failure is FAR less common than inverter failure, where small capacitors go leaky (15pF 3KV - something like that), or transformers fail.

CaptchaTrader · 27th April 2010 07:45 PM

Maybe I was too optimistic.

When I replaced the bottom bulb on my LCD monitor, it was easy. I just found it online, and popped out the old one, and stuck in the new one!
I guess they are not all designed like that.

21st February 2011 06:06 AM

Did you ever find a replacement bulb for your 3007FPW? I am having an issue with mine and I'd like to replace my bulbs.

My screen is very, very "yellowish" compared to other LCDs. I have 2x 2405FPWs sitting on either side of my 3007FPW and they are fantastic monitors with very bright backlights 6 years later. I just got the 3007FPW on eBay (sigh...) and the auction was totally misleading. The monitor is fine physically and it works, but the backlight is absolutely terrible. If you have any advice on where to buy a bulb and how to replace it I would really appreciate it.

23rd February 2011 11:27 PM

but the problem looks to be the invert as Nigel Goodwin said cuz if you look at the pic its the same pic so there for its bright when 1st turned on then after a few sec it happens plus the bulb will be burnt out will not light ever again lol

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Electronic Circuits and Projects Forum

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