Question about Hitachi Performa CP-RS55 Multimedia Projector

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Bluedots blue dots on the screen, looks like dead pixcell, these are present in two groups on the screan, can u plz help me in resolving them.

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Hi there

This is a faulty LCD - only way to get of the problem is to replace the faulty LCD.

Must warn you that the LCD's are normally expensive.

Posted on Mar 26, 2008

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Posted on Jan 02, 2017

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Whydo i have pink dots on my screen


Hi gailandst632,

I saw you post stating that you have pink spots/dots on your Screen.

to determine what the problem is we weill need to turn your computer off and boot into the BIOS screen.

1. Turn your Computer Off, then as soon as you power the machine On keep on tapping F1 on the keyboard to get the BIOS screen it will be a Blue screen with white fonts on it, in that screen see if the pinks dots are present or not.

2. If the pink dots are present in BIO then that means that the LCD screen of your Laptop needs to be replaced.

3. You will need to call your manufacturer regarding this concern check if your system is still in warranty, because this will be very expensive if you are out of warranty.

4. All manufacturers will cover a pixelated LCD screen if the dots or pixelated area has at-least 5 or more dots/pixelated areas on the LCD screen.

I hope that his will help you with the concern that you have posted.

Have a nice day.

Apr 05, 2011 | Computers & Internet

1 Answer

Blue dots are on the screen in large clusters all of the time in the same places.


It sounds as if you have a group of dead or stuck pixels.
One method that sometimes works is to turn the TV off, and rub the area with the eraser end of a pencil. Try turning the TV back on and see if this solves the issue.

If the TV is still under warranty, it may also be advisable to check the section of the warranty related to dead or stuck pixels, as sometimes this issue can not be fixed.

Feb 28, 2011 | Televison & Video

1 Answer

What does it mean by dead cells?


I assume this is related to your LCD monitor.
I think you mean dead pixels. The LCD monitor has tiny pixel elements, one for each red, blue, green color and each one of these colored pixels are turnes on by a transistor. When a transistor fails then the colored pixel it controls does not light up. This is a dead pixel and it shows up as a tiny black dot.
If the screen displays a blue screen, a dead blue pixel will appear as a tiny black dot in the blue screen.
You normally would not notice a few dead pixels unless they are grouped together.

Sep 20, 2010 | Hanns.G Corporation HW191D 19" LCD Monitor

1 Answer

2004 Sony KDF-55WF655 LED TV. Blue dots grouped and sparce all over the screen. Some dots appear to be twinkling. Lower corner has bright cloudy display. Dots and cloudy corner display will change state...


Bad Light Engine Call Encompass Parts Distrubtion
1-800-638-3328 or Visit their website they will list Parts in stock for this Model. UED has light engines
1-800-648-6657 you can also Look them up on Ebay sometimes you can find Parts alot cheaper their.Part number#A-1084-662-A Pice $1,423.64 core fee $800.00 Part Cost $623.64

Mar 25, 2010 | Televison & Video

1 Answer

White dots appeare on my Samsung LCD screan


Sounds like your panel is on its last legs so to speak. 
Might be time to look into replacing the panel. Running a high contrast can lead to a shorter panel life which may cause the occurence of dead pixels.

Mar 02, 2009 | Samsung LN-T4665F 46 in. LCD Television

1 Answer

The is a very small blue dot on my Canon xti screen


It can be regarded as normal, yes. All LCD screens will have a percentage of dead pixels, and no manufacturer will guarantee you get a dead-pixel screen on their products.

As you say it does not affect your photos and you can be assured it is not something that is going to get worse - it is a tiny manufacturing defect that is all, but within what they call acceptable limits.

If the camera is brand new you could always take it back and ask for another one, but they are within their rights (I believe) to say no for a single dead pixel.

Jan 25, 2009 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

An irregular blue mark on screen after a fall on ground


Hi. It sounds like you've damaged the LCD screen. The blue dot is basically the ink in the screen leaking. There's a guide for replacing your screen here http://www.formymobile.co.uk/6300disassembly.php

Nov 13, 2008 | Nokia 6300 Cellular Phone

1 Answer

Blue dots in the middle of the screen


The image processor must be getting old and worn out. Call Epson or go onto their website and see if it is  a dDIY project or if you will ned to send it in.

Apr 27, 2008 | Epson EMP S1 Multimedia Projector

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