Question about Sharp 19C140 19" TV

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Display (crt) dosent show red ,green and blue colors

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  • 116 Answers

Check The IC Chroma or Video, replace it..

Posted on Sep 30, 2010

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Posted on Jan 02, 2017

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2 Answers

LG 700E CRT 17" monitor,


problem with the monitor Display cable. it is damaged.

Normally monitor will receive 3 colors red, green, Blue signals from CPU. If one cable i.e Red wire connection is missing in display cable which is connected to monitor, Red color image on monitor wil be replaced with other fade color.
So, need the replace the display cable or display connector!

Dec 09, 2010 | LG Studioworks 700S 17" CRT Monitor

1 Answer

Clear but only blue/green color


Do you have a component cable hooked up to the TV? (cable with RCA connections Green/Blue/Red/White/Red)

If so you want to check that the red cable is tightly connected to both ends (TV and whatever it is connected to).

Good Luck...

Jan 23, 2010 | Toshiba 36A41 36" TV

1 Answer

My tv only shows the blue and green colors. I opened up the back and the red lens is not on????? What do I do?????


Check if the menu display shows the same. If the same, then check CRT, CRT board, G2 voltage for around 200V. If menu display ok, check red component cable. :)

Dec 29, 2009 | Sony KP-61V90 61" Rear Projection...

1 Answer

On a white picture my screen has a yellow color to it and at times mill have a blue blur on the bottom left corner of the screen. also i get blue dots in the middle on the screen.


Hello: Seems like you have a picture tube problem. The yellow color is from a weak green crt. I suggest replacing the Red and Green Crt's in this model. They are nortoriuos for Failure especially the Red. The cost for these tube vary from 110.00ea to 150.00each. I don't know if you want to spend that type of money on this set, as i Know this peticular set has an expectional picture quailty, my experience with replacing sony picture tubes, is to replace all three tubes, as the new ones will show brighter. So replacing the red and green crt's and not the blue is not recommened. But thats up to you, you might not notice the color difference yourself. You also have the option of sending the Crt's for refurbished ones or having the originals rebuilt by a company in Calif, called VDC, Video display Corp. They sell and refurbish sony CRTs. This route is much cheaper, the only problem is having the crt's taken out and sent for repair. The other option is to think about purchasing a new set. As this repair price could reach into hundreds of dollars, Around $600 to $700 for parts and Labor..

Nov 18, 2009 | Sony KP-65WV700 65" Rear Projection HDTV

1 Answer

Display color changed from green/ white now to Red and blue?


Hi and welcome to FixYa,

Your described problem is as you suspected, the green is missing. This is a common failure and is technically an easy/quick repair. Almost always, the culprit would be a cold solder or a faulty color drive transistor/IC. They would be located on the small squarish PCB (printed circuit board) at the very rear of the tube. Of course, worst case scenario would be a faulty CRT (picture tube), but that would be least likely.

Corrective measure would then be initially re-soldering above describe solder joints and/or replacing faulty transistor/IC.

Good luck and thank you for using FixYa.

Feb 21, 2009 | JVC AV-27530 27" TV

1 Answer

No yellow or blue color displaying


In a monitor like crt type. there are three colors amplifier. Red, Green and Blue. I think the Blue color amplifier is defective. Try check the biasing and also the transistor.

Feb 02, 2009 | Samsung SyncMaster 753S 17" CRT Monitor

1 Answer

Crt monitor video chroma processing


first you check the signal cable continuty by multimeter then correct it if faulty .if ok then give -ve click at red cathode on crt base in on condition if red raster comes on screen then red cathode is ok same thing for green and blue cathode if green cathode do not shows green raster after -ve click then crt is faulty then give -ve click at R point at color raster ic which has heat sink if red color comes then ic is ok same thing for green and blue if ic is faulty then replace it if not then check bipolar capacitor if faulty then replace it

Sep 15, 2008 | AOC CT720G 17" CRT Monitor

2 Answers

Help with kogi F9AH screen


Intermittently displays bright red/green/blue raster then shuts down with led flashing 2, 4 or 5 times
Amazingly this was due to the CRT being faulty !

Blank raster
Replace defective TDA6111Q for Red, Blue and green

Red or Green or Blue screen
Check and replace on crt module : D702, D703, D704 (all 1N4148) replace with type 1N4948T

Dead, led flashing red/green at first, then going to red standby
Replace C604 (1000uF, 16v) elec. cap. It is in the decoupling circuit for the 5 volt supply

Nov 23, 2007 | GVision F9AH-TG Television

1 Answer

Benq v772 CRT show only Blue and Green color


It has to be either a cable or an IC issue. Get your cable checked first (VGA cable)

Oct 01, 2007 | BenQ Value V772 17" CRT Monitor

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