On the power the lcd screen black color change to blue cannot see the black color and have a interference.i connecter with externel crt monitor the monitor is ok.i take out the HDD & RAM also the same.but some time i press the main board the lcd screen can back to normal. can use 1 or 2 hours sometime 2 day.now totally fail.
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try to connect to a VGA Monitor (it has DB15 Connectors(bing or google it) and usually in blue or black colors) and press and hold windows key then press P on your laptop keyboard or (peripheral PC keyboards) tap these shortcut for 2 or 3 times and see what happened, if you see any changes on monitor or see your screen on the VGA monitor your Graphic card is fine so go to the next step if not
maybe you have chipset problem or bios (UEFI) problem so go to the certified Repair shop,
some laptops have a shortcut key to turn your LCD off in expanding screen mode for decrease power consumption. try press (fn + keyboard key that sometimes has a rectangular icon with x icon on top of it) if you try but nothing changes or see white screen or glitch
screen pixels then 2 possible things happened,1- your LCD flat cable or 2- may be your Screen LCD damaged in this case go to certified repair shop center
This is from Dell.
Error 2000-0334 indicates a problem with LCD panel, cable. As the video is fine on the external monitor, there is no problem with the video card or mother board.
To confirm the error message please run the LCD BIST on the laptop to check if there is any problem with the LCD screen.
To initiate LCD BIST:
Connect the AC adapter to your computer.
Hold the letter <D> on your keyboard and then turn on your computer.
You will see four colors (grey, red, green, and blue) on the screen in a sequence.
If you see any colors on the screen the LCD screen is fine.
Or if you find the giant fuzzy black vertical line or if the colors are seen only on have of the screen during the test, then the problem is with the LCD screen and LCD needs to be replaced.
From a power off state, hold the D key and press the power button see if you get 4 solid colored screens (Red Green Blue ans White) this is the LCD BIST and if you get those colors, then LCD itself is fine. in which case you likely have a motherboard issue
If you get nothing then the LCD is bad and likely needs replacing
First see if the power on self-test (Fn+ Power) or the LCD BIST (D+Power) will run. The Diags are normally on a blue screen with white test, the LCD BIST is simply 4 Solid Color Screen looking for defects in the LCD panel.
If you hear beeps/windows sounds when the system boots and the LCD BIST test does nothing then the LCD has likely failed and you will need a new one. You can try an external monitor and see if you get video on an external screen.
If you don't then try these steps:
If you have a LCD-screen, not an old-style CRT-screen, it is the data-cable, and its connections, that are not transmitting one of the 3 "primary" colours, e.g., mix red & blue & green to get white,
but mix only two of those colours, and you could get pink,
because the mixing is an "additive" process.
If you mix NONE of the 3 primary colours, you should get BLACK.
If you see GREEN, you're seeing ONE of the primary colours.
Reseat the video cable connection under the keyboard. If no change, press the Fn Key while Pressing power button, this will start a PSA diagnostics, there will be 2 sets of color bars appear and a Yes or No at the end of 2nd color bar, press N to start the LCD diagnostic. If the LCD is still 1/2 and 1/2 in the LCD diagnostic, you need an LCD. If the issue doesn't appear in the diagnostic, then replace the motherboard.
A pink or red screen which may gradually turn back to it's appropriate color indicates the lcd is going out. It could last quite some time in tht condition, but it's going. replacement isn't too bad though.