computer monitor problem

There seems to be a horizontal deflection problem. Could be a transistor, IC, capacitor, power supply issue, and so on. I'd say replace it or, if in warranty, notify Dell or the retailer.

I would start by checking or replacing the horizontal output transistor, it could also be as simple as solder joints.

You will need a schematic to locate the horizontal transistor path. It can be a slightly tedious process to track and fix the problem. Replacing the transistor may fix your problem or it may just mask it for a while. There are some pretty good sites to get you started...

hi friends, I have mag(model:dx15f) when I switched power on the relay in the power supply clicking continuously

many thanks for all yar

MAG model:dx15f try to search it by google

Likely going into safety shutdown mode. This occurs when the unit senses there may be an excessively high anode potential being generated, to prevent xray radiation. I doubt the pix tube is in good enough shape to warrant paying for repairs, unless it was used very little over the years.