Samsung syncmaster225UW monitor suddenly not working on pc. Plugged into laptop works fine on analogue, on sons pc shows digital and wont let me change to analogue, any ideas, im not technically minded, but clearly the cables are all ok as is the monitor. Is this something that i could do, or is a technical problem. PS worked fine yesterday. Many thanks.

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The buttons are stuck - If the screen is out of warranty then i would take it apart and see if he buttons can be unplugged or cleaned up.

If in warranty Samsung is excellent with repair service. - Depending on the model LCD its either 1 or 3 years warranty.

SOURCE: Samsung GH19LS LCD Monitor wont display computer signals

You should have received two cables with the monitor. One is for VGA and plugs into you video card or computer board . The second one is for DVI digidal video and if you have that cable it plugs into the square connector. Then if you look into your monitor manual or quick setup sheet it will tell you how to connect and set the monitor to either VGA or Digital. I'm sure that is what has to be set. Don't hook up both cables to the monitor and computer. Only use the one. Digital gives you a better picture if your computer has that function. Hope this is helpful. Bud

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Typically this happens when the resolution of the display is out of range of the monitor. Normally this is when the resolution is too high. Have you changed the resolution settings? Also, not to be crass, but if there a video card in the system, be sure that you are connected to the correct VGA connector. With an extra card in the system, the onboard VGA connector is not used.

Keep us posted,
Dan

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try the monitor on a friends computer or family menbers computer first as it may be your grafic card at fault.

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This problem often occurs in samsung SyncMaster LCD monitors.

The solution is open your look for the LCD monitor power supply module (which have PCB connector to the AC power), on that board look for capacitors, now look for broken one which upper part is bloated, like the image below:

If you find a damaged capacitor as in the picture then you should replace it with the same value.