Author Topic: Testing DVI after surge  (Read 340 times)

0 Members and 1 Guest are viewing this topic.

Offline Chris2019

  • Newbie
  • Posts: 3
  • Country: ch
Testing DVI after surge
« on: September 10, 2019, 02:10:00 pm »
There was some sort of transient electrical issues which appears to have damaged an LCD monitor and attached Fujitsu mini PC. DVI is dead on both, but the PC works fine otherwise (can login via remote desktop). I've ordered spare power and video boards for the Lenovo LCD and will change both to be safe.

The question is, how can I test the DVI port on the PC (to determine if it is really dead or just the screen) without possibly destroying the new monitor parts? Is there a way or is there even much risk in just plugging it in seeing what happens?

Thanks!
 

Offline Chris2019

  • Newbie
  • Posts: 3
  • Country: ch
Re: Testing DVI after surge
« Reply #1 on: September 11, 2019, 04:07:54 am »
 :-[
 

Online blueskull

  • Supporter
  • ****
  • Posts: 13177
  • Country: cn
  • Power Electronics Guy
Re: Testing DVI after surge
« Reply #2 on: September 11, 2019, 04:39:44 am »
DVI aux power should be no more than 3.3V, and you can measure that. There should be no more than 3.3V on all pins with respect to ground.

TMDS signals are input-side DC blocked, so 3.3V or 5V zapping the LVDS receiver should never happen unless the spike is too high that it zapped the caps.
 

Offline SilverSolder

  • Super Contributor
  • ***
  • Posts: 1312
  • Country: 00
Re: Testing DVI after surge
« Reply #3 on: September 11, 2019, 12:19:55 pm »


1) Hook the monitor up to a known working PC to see if the monitor still works,

2) Hook a known good monitor up to the PC to see if the PC still works?
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf