Question about Sony CPD G420 19" CRT Monitor

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Screen has become slightly out of focus

No it is not my failing eyesight - haha! i have just noticed in the last while that the text on the screen is becoming very hard to read - all users have noticed this. looking very slightly out of focus. i cannot find a sharpness function for this monitor? can anyone help? the monitor is on a G4 mac, and up till now has been the best monitor we have ever used. thoroughly recommend it for those needing accurate print colour. thanks heaps. mike

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SOURCE: Sony E530 focus (?) problem

I think it can solve with this way:

Press Menu on the front panel of the monitor. Then press OK button and go down and go to COLOR : PRESET. Press OK and go down. Press IMAGE RESTORATION.

My E530 monitor is more clearly, now.


Posted on Nov 24, 2008

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CRT monitor screen is out of focus.text and other images looks blurry


This kind of symptoms can be correct by the focus adjustment at the flyback transformer. FBT mostly has two control knob (Focus and Screen), focus is usually at the top one like in the sample picture below.


Open the back cover of your unit and then locate the FBT. Power on the unit and try to adjust the focus knob.

If the symptoms can't be cured by the this step, this is an indication that the CRT socket is already faulty. You have to replaced this parts and then make some adjustment at the focus knob of the FBT and your unit will back to normal again.

CRT(picture tube) socket


Hope I helped you.
Have a nice day!
Thanks for using Fixya.


Jul 14, 2011 | Samsung SyncMaster 753S 17" CRT Monitor

1 Answer

How do i enlarge the print on the screen

there are several things you can do, change the screen resolution, or change the size of the text, to do this go to Control Panel - Appearance and Personalization - Display then click the 125% radio button and apply. in versions of windows older than windows 7, this process may be slightly different, this option may be in the ease of access centre. if you have trouble changing either of these things type your operating system and change screen resolution or change text size into google. to change the screen resolution go to control panel and in appearance and personalisation click adjust screen resolution, this will make everything look bigger, try to keep near the same aspect ratio or photos and text will look distorted or stretched.

Mar 14, 2011 | AOC Computer Monitors

1 Answer

Screen becomes dark the longer the computer is on, any reason why?

This is indicative of the screen dying, CRT monitors are very dangerous and its probably a good thing that its dying as it will save you from some radiation and bad eyesight :)
Sorry to sound gloomy but there isnt really much that can be done to resolve this issue, you can try the degauss option if it has one (in the monitors menu), that might flash some life back into it but I doubt it.

Oct 31, 2010 | Proview PS 776 Monitor

1 Answer

The text on my screen is too stretched and unfocused

Make sure that you are running at the recommended resolution for your monitor. for example, and 20" widescreen should be at a 1680x1050 res

you may need to update your drivers and or video card to achieve a widescreen resolution.

Jul 31, 2009 | Acer Computer Monitors

1 Answer

Sony 24'' CRT widescreen GDM-FW900 blurry after initial on

CRT shorts are common with this model and focus problems are a major symptom. however, the loud 'pop' you described leads me to believe that the flyback transformer may have a problem in the focus divider portion. replace the flyback, if that fails then the CRT is most certainly the problem

Nov 20, 2008 | Sony GDM-W900 24" CRT Monitor

1 Answer

Blurry screen

There is a focus adjustment inside on a part called the flyback transformer. It's located toward the back of the circuit board, and you'll know which part it is by the red cable going from it to a connection on the picture tube. The flyback generally has two small adjustment knobs on it. The focus knob is the upper one. Slightly turning this one way or the other may improve the focus a bit, but usually a sudden loss of focus means either the flyback or the picture tube has failed. Either of these is cause to treat yourself to a new monitor. You can buy 17-inch flat screens now for less than $150 at regular prices, and sometimes you'll catch a good sale at the office stores.

If you choose to try the focus adjustment, BE VERY CAREFUL!!

1) You have to remove the back of the monitor and work with the power on. Parts inside, especially the picture tube, can give you a very nasty shock AND EVEN KILL YOU.

2) Be very careful where you are putting your fingers when working on a live set. Make sure you have a safe grip on the adjustment knob first, THEN look at the screen while you adjust it. Don't go blindly reaching around.

Aug 31, 2008 | HP Compaq FS7600 17" CRT Monitor

1 Answer

Stripes on my Samsung Monitor

The contrast may be to high.
Adjust the brightness and contrast to make it go away but still readable.
if that does not help the FL (backlight) is going and the unit will need to be replaced.

Jan 02, 2008 | Samsung SyncMaster 913V 19" Flat Panel LCD...

1 Answer

Blurred Corners

hi there, its a decousing problem, look for the connection of the decousing which is connected behined the pic tube to the board. check some electronic parts, it may be temperature resistor, termistor, transistors, capacitor, etc.ty

Dec 25, 2007 | LG Studioworks 775N 17" CRT Monitor

1 Answer

LG 995FT slightly out of focus

do u have its driver?
send me it to

Oct 27, 2007 | LG Flatron 995FT 19" CRT Monitor

1 Answer

My samtron 55 monitor becomes hazy and out of focus

Focus and brightness (sometimes called screen control) are usually adjusted in the flyback transformer. Check for a bad connection where the flyback is soldered to the board. This could also indicate a problem with the CRT.

Sep 06, 2006 | SAMTRON 55V 15" CRT Monitor

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