Question about HP Pavilion a305w (DM181AR) PC Desktop

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Main screen only has three boxes BGR

Nothing come on screen 3 boxes with messages in them blue is testin, green says monior working red says check cables

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The monitor is telling you it's not getting a signal from the computer. The message is displayed to show the monitor is on and can display an image, but the computer is not sending video. Probably the computer is not starting up, or there has been a failure of the video card. You'll need to check into the cause.

Posted on Dec 09, 2008

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The screen is green and the tint option in the menu cannot be adjusted.


This symptom usually indicates CRT failure. Projection TV's, especially older types use 3 CRT "guns" to project the image on the screen. One is Cyan or Red, one is Green and one is Blue. If the Red and Blue become weak or do not project, the Green gun overpowers the output of the other two. These three "guns" are aligned exactly on top of each other so when all three are correctly functioning, the correct colors are projected on the screen.

Oct 04, 2015 | Televison & Video

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What to do when you only have Green on a CRT Projection TV.


If you have a picture, but only in green on a 3 crt projection TV, I would try turning up the drive for the red and blue guns. They have probably changed over time and red and blue have lost drive and need a boost. Green makes up 70 percent of the picture compared to red and blue so the drive would not have to drop much to lose red and green but still have green. Keep in mind that this does mean that the CRTs are dying and may not have too much time left.

To turn up the drives first remove the back cover on the bottom half of the machine. Be very careful as you will have to work on this unit live. Do not touch anything other than what I tell you and keep one hand in your pocket whenever possible.

First look at the space above the main circuit board. Somewhere across the beam supporting the CRTs you will see a square box with 6 controls (shafts). You can locate the box if you follow the wires from the flyback to the box. The flyback is located on the power board and produces the high voltage. It will have 4 large red rubber wires coming out of it. Three go to the focus divider block (the box in question) then they go on to the crts (red, green, blue).

Once you locate the focus divider look at it closely. The focus controls are on top and the drives are on the bottom. They should be marked red, green and blue. You want to turn up the red and blue. Tune a picture with as much black as possible. While watching it turn up the red until you see a red tint or streak then turn down until it just disappears. Do the same with the blue. You may want to touch up the green also for good color balance.

If the set is working OK and the CRTs have enough drive left, your picture should look normal.

Thanks for using FixYa.

hardrocko

on Sep 22, 2010 | Toshiba 50H81 50" Rear Projection...

1 Answer

Sony KP-53S65. Only have the green lens working. Blue and Red out. Everything else seems OK. What's going on with it?


mrrcody56,

If you have a picture, but only in green, I would try turning up the drive for the red and blue guns. They have probably changed and need a boost. This does mean that the CRTs are dying and may not have too much time left.

To turn up the drive first remove the back cover on the bottom. You will have to work on this unit live so be very careful and do not touch anything other than what I tell you.

Look at the space above the main circuit board. Somewhere across the beam supporting the CRTs you will see a square box with 6 controls (shafts). You can locate the box if you follow the wires from the flyback to the box. The flyback is located on the right rear corner and produces the high voltage. It will have 4 large red rubber wires coming out of it. Three go to the focus divider block (the box in question) then they go on to the crts (red, green, blue).

Once you locate the focus divider look at it closely. The focus controls are on top and the drives are on the bottom. They should be marked red, green and blue. You want to turn up the red and blue. Tune a picture with as much black as possible. While watching it turn up the red until you see a red tint or streak then turn down until it just disappears. Do the same with the blue. You may want to touch up the green also.

If the set is working OK your picture should look normal.

Thanks for using FixYa and for the generous rating.

hardrocko

Sep 21, 2010 | Sony KP-53S65 53" Rear Projection...

1 Answer

The pictures are all blurry and all three colors show up on the screen volume and everything else is ok what do i do


you can adjust your screen focus located at the main controll pannel it is labelled as focus adjustment..if this not work replace the CRT socket of the 3 cathodes the red,green and blue

May 17, 2010 | Philips Magnavox 51MP392H Rear Projection...

2 Answers

Lg crt monior display cable wire circuit diagram


Pin Signal 1 Red Video 2 Green Video 3 Blue Video 4 Monitor ID - Bit 2 5 Ground 6 Red Ground 7 Green Ground 8 Blue Ground 9 [KEY] 10 Sync Ground 11 Monitor ID - Bit 1 12 Monitor ID - Bit 0 13 Horizontal Sync 14 Vertical Sync 15 N/C (Reserved)

Feb 11, 2010 | Computers & Internet

1 Answer

Toshiba TP43h60 - Wondering what the dials are for


You are describing the MASTER SCREEN/ FOCUS CONTROL BLOCK---black with six controls--three are red, green and blue focus--the other three are screen controls--red, green and blue--- the screens are adjusted so with the color off you have normal brightness and a black and white picture--

They have nothing to do with any Convergence problem and unless they have been tampered with rarely need to be adjusted---

Let me know if this helps you AND IF YOU HAVE ANY QUESTIONS OR NEED ADVICE--LET ME KNOW.

I am here to help people.

SD TECH

Oct 09, 2009 | Toshiba TP43H60 43" Television

1 Answer

The color on the screen is green when I watch movies. How do I fix this problem?


Good day sir, your inquiry about the green lcd screen can be caused by several things. 1. The monitor/tv produces 3 colors, red green and blue, the tv mixes these three colors to produce the picture. a loss of red and blue produces this green screen. so check the cable, specially the red and blue jack of the component inputs, and the red and blue cable. 2. there may be loose contact on the signal cable. try using the video input instead of the component input. 3. the dvd player may have the problem, check the player component out jack. a loose jack port can cause these problem. hope this may help. thanks

Jul 20, 2009 | Toshiba 32AV502U 31.5 in. LCD HDTV

1 Answer

3 screen colors have separated and screen is bowed in the middle.


I take it this is a projection TV. so they use three lensed CRTs red green and blue. you should have a setup screen that projects a grid pattern. red green and blue. there is SOMEWHERE a adjustment that overlaps the three projected grid patterns. Making a WHITE single grid pattern. red green and blue make white light. Pin cushioning is the bowing. you may find a POT to adjust on the back of the set. I have no idea what set you have.
Lastly.. Pin cushioning can also be caused by faulty flyback transformers.
Hope I could help.. new here LOL
Happy Fixing =)

Jul 12, 2009 | Televison & Video

1 Answer

I have little boxes at the bottom of my screen. They appear when there is a light picture on the screen. Three rows of small rectangles. Help! Mitsi 65 that just got the blinking green light fixed.


you're probably used to watch tv with le closed captioned on. On big sceen tvs, the closed captioned text will burn the 3 crts (green, red and blue) it is written on the first page of your owner manual and there is nothing to do to fix it. it would very costly. sorry

Jun 30, 2009 | Mitsubishi WS-65809 65" Rear Projection...

1 Answer

Color lines out of focus


Best Solution posted on Apr 12, 2008 Asker's Rating 3%20stars_w.png
dc2eb76.jpg MikeNJ1964
Rank:guru_s.gif Guru sony.gifSony Expert
Rating: 89%, 674 votes
You have a completely different problem. The screen voltage for the blue picture tube is slightly too high on your set. This will put fine lines in the background of the picture, called retrace lines. This is very common and easy to correct. Remove the front speaker cover and the access panel behind it. Look inside and you will see a black box with six controls, each control having a little white glue on it. This is the Focus/Screen block. Three controls are labeled Focus and three are labeled Screen. The screen control in the center is for green but I am not sure if the screen control on the left or right is for blue for your model. With the TV on, set it to VIDEO 1 but do not connect anything to the VIDEO 1 jacks. This will produce a pure dark picture, showing any faint lines in the background. Choose one of the screen controls and increase (turn clockwise) it slightly. If the blue lines do not get brighter it means you are turning the red screen control, so put it back where it was and choose the other screen control. When you find the blue screen control, decrease (turn counter-clockwise) it until just when the blue lines are gone. If you want you can check that the red and green screen controls are set to just below the point where their faint lines are visible. When done, replace the panels and your picture will be back to perfect.
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noavatar_s.gif gator149
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MikeNJ1964 was exactly right! I have a Sony KP-65WV600 that had horizontal green lines that showed when the picture was darker. I had to remove 3 screws on the right and left side of the tv holding in the speakers...carefully pop out the middle panel from the clips holding it in....remove 4 screws from the cardboard in the middle and remove the cardboard. I then saw the six screws. The adjustment screws were the three below. I turned the middle screw until the lines dissapeared. I tried the left screw and blue lines appeared which I then adjusted away.
THANKS a bunch. SAVED me money!!!

May 15, 2009 | Sony KP-65WV600 65" Rear Projection...

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