Question about Dell Latitude C640 Notebook

1 Answer

LCD Dark Hot Spot in lower Left hand cornor

After a while i get a dark hot spot in the lower left hand cornor. Do i need a new LCD or a inverter not sure what to do.

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 104 Answers
Re: LCD Dark Hot Spot in lower Left hand cornor

Well the inveter powers the lamps in the LCD itself. If the lamps come on ,you don't need a new inverter but more than likely just a new LCD! hope this was helpful regards, babb

Posted on May 10, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Black spot appeared on the screen on bottom left side how to clear it

A large black spot usually means the LCD screen is damaged. It may have fine cracks around the black spot. In this case the LCD screen needs to be replaced.
A replacement screen maybe available for your laptop from this WEB site.
LCD screens and Inverters

Feb 12, 2013 | Lenovo PC Laptops

1 Answer

My dell inspirion 6000 laptop screen goes black but sometimes I can see the windows screen but it's very dark. When I attach it to a desktop monitor it works fine but the laptop is still dark. Sometime the...

The back light is the whole of the screen, the screen is illuminated by a CCFL lamp (fluro tube) on the bottom of the screen. A inverter supplies high voltage to this CCFL lamp.
If your laptop appears to boot up and the hard disk LED flashes, then the problem is probably a back light fault. This can be a faulty inverter or a faulty CCFL lamp. Please click on this link and follow my instructions to identify the fault and possible fix :-

Feb 08, 2011 | PC Laptops

2 Answers

The problem started with a dark spot in the bottom left corner. It grew so that it started to touch the "Start" of the Windows taskbar. The spot was too hot to keep my finger on it while the rest of the...

quote:"The spot was too hot to keep my finger on it while the rest of the screen was cool" You have a partial hardware failure on the lcd's internal circuitry (column and row drivers, stuff like that).
The short time it's working is about the overcurrent protection delay, it cutt's itself the Vcc, Vdd and control signals for limiting the fire hazard.

Oct 13, 2009 | Acer Aspire 1642WLMi Notebook

1 Answer

Hi, My laptop sony vaio came from repairing with a new LCD, the old one had a dark spot and they changed it. When the new one came i noticed it had half the screen lighter than the other half, and it's...

explain to them on the defferent the old and new regarding the lighter.. check the inverter maybe the inverter only problem because if the lcd there is no inverter of course the lcd will not give exact light its dark.....

Sep 17, 2009 | Sony VAIO SR Series Notebook PC...

2 Answers

New inverter in Dell Inspiron 1501 now the LCD screen gets hot!

I've had the same problem with a Dell Lattitude D531. I've been told that it's the screen itself (which may have led to the original inverter going bad) but that one should also check to make sure none of the screws are making contact with any wires back there.

Sep 10, 2009 | Dell InspironTM 1501 Notebook

1 Answer

A dark spot in the middle of the LCD display screen.

It can't be removed, unless its a dirt spot and then you can take a paper towel with some glass cleaner on it and then you can wipe off the screen.

Try that anyway and if it doesn't come off then you know the LCD is going bad on you and you'll have to get it replaced eventually.

Sep 03, 2009 | Dell PC Laptops

3 Answers

Dark area on left side of screen of Dell Inspiron 1525

ok , i have had this problem on bolth my dell inspiron laptops , on a 6400 and a 1525 . the 6400 had the lower left corner all dark and the 1525 was split right down the center . i fix bolth of em in a really simple way , turn on ur pc and go into windows , press the blue Fn button and the down arrow untill ur brightness from ur backlight is completely down . keep it that way with the screen on with a screen saver for about one hour then turn brightness back up but not all the way up cuz in my case the problem hapened again , but when i keep it just one click darker , boom problem fixed . from what i can figuere out is that the inverter aint powerfull enought to power the backlight and tends to over heat , so keeping the backlight a bit lower tend the keep em ok

May 28, 2009 | Dell Inspiron 1525 Notebook

1 Answer

Red spot on LCD

1) That red spot means that a pixel is stuck, actually it's very common on LCDs.
2 and 3) It usually occurs for a manufacturing issue.
4) The most of the time it doesn't mean that the whole screen is going to fail, but in my case I would take advantage of the warranty if the laptop is brand new and the warranty is still there.
Good Luck!!!

Feb 24, 2009 | PC Laptops

1 Answer

Hp dv6149us right half of LCD is dark, left half is OK

Sorry to say, I had a similar problem except my screen was upper/lower not left/right. If the drivers and hardware appear fine then it is the screen or connection to the screen. If under warranty send it in now! If not you may need to buy a replacement screen. Shop around for prices AND other solutions- (not being there to give it hands-on care) I may be mistaken.

Jan 30, 2009 | HP Pavilion dv6000z Notebook

5 Answers

HP DV1000

jutic, the problem is most likely the inverter board. Here is your manual.You can see what it takes to replace it.

Jan 22, 2008 | HP Pavilion dv1000 Notebook

Not finding what you are looking for?
Dell Latitude C640 Notebook Logo

Related Topics:

1,159 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dell PC Laptops Experts


Level 3 Expert

1038 Answers

Sudeep Chatterjee
Sudeep Chatterjee

Level 3 Expert

3267 Answers

Donna Sander

Level 2 Expert

193 Answers

Are you a Dell PC Laptop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides