Member Avatar for joodee

My monitor - a Viewsonic E70f has developed a pale green patch in the top right corner. The green area is only faint but it has appeared since I installed a new video card. (Chaintech nvdia GeForce 4200 128mb), The monitor is only a couple of years old. Any ideas? :(

  • 2 Contributors
  • 2 Replies
  • 99 Views
  • 1 Day Discussion Span
  • Latest Post Latest Post by joodee

Dani AI

Generated

A couple of simple checks will narrow this down quickly. was right to suggest magnetic interference as one possibility, and later noted the monitor was dropped — those two causes point to very different fixes, so run the tests below to isolate the fault.

  • Isolate monitor vs PC/video card: connect the monitor to a different machine or plug a known-good monitor into the original PC. If the blemish follows the monitor, the problem is the display; if it follows the PC or only appears in Windows, try reinstalling drivers or using the old video output.
  • Check whether the spot is color-channel specific or location-specific: show full-screen red, green, blue and white. If the patch appears only on green, suspect a video-channel or connector issue. If the same spot shows on all colors, suspect panel/CRT damage or magnetization.
  • Check cables and OSD: power off, reseat the VGA/DVI cable and any adapter, try a different cable. Use the monitor OSD/self-test if available (many monitors show a self-test pattern with no PC connected).
  • CRT vs LCD clues and remedies: on CRTs a green blotch can be caused by magnetized components and is often fixed by degaussing or moving speakers away. On LCDs a pale patch after impact usually means pressure or internal panel damage; those sometimes fade but are often permanent.
  • Safety and next steps: do not open a CRT (high voltages). If diagnostics point to internal damage from the drop, repair often costs more than replacement unless the unit is high-end or under warranty (note: physical damage commonly voids warranty). If tests implicate the video card or connector, swapping cards/cables is an inexpensive fix.

These steps will identify whether a simple fix (cable, degauss, driver) will work or whether the monitor needs professional service or replacement.

Member Avatar for dewman

Is there a speaker nearby that location? The magnets on speakers will create that symptom if they are too close to your monitor.

Member Avatar for joodee

Thanks for the hint on the speakers. I went home and started to move the speakers and my son admitted that wasn't the problem - he had actually dropped the monitor! However, the good news is that the green spot has almost disappeared.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.