1. Home
  2. Electronics Repair
  3. computer monitor problem

computer monitor problem

Hello, I have a Dell-branded monitor, model D1728D-LS, that has an issue. Yesterday, it was working fine until mid-afternoon when the viewing area changed to an vertical 2"-wide rectagle. It did not crop the image, rather the width of the monitor was compressed into this rectangular area.

I've tried turning it off/on, disconnecting the cable (the "check signal" message was squiggly and also appeared illegibly about 2 inches wide), and I connected another monitor to the same machine...the other monitor displayed the screen properly.

Is there any other troubleshooting to do (I have a basic/moderate understanding of electronics) or anything else to check or attempt to configure?

Thank you, Dave

Reply to
tom_sawyer70
Loading thread data ...

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.

Reply to
Charles Schuler

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

Reply to
James Sweet

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...

formatting link

formatting link

formatting link

formatting link

Reply to
borgunit2003

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

Reply to
st_yar

MAG model:dx15f try to search it by google

Reply to
st_yar

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.

Reply to
Ray L. Volts

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.