Sony SDM-HS74P monitor exhibits intermittent "posterization" effect

ABDUL MAJEED

• 180 Answers

SOURCE: MY SONY SDM-HS74P

You open the inverter unit and check any dry soldering is there. Some times dry joints inside the inverter unit cause this type of problems.

Posted on Apr 08, 2008

SOURCE: Sony SDM HS74P Screen Stays on for approx 15 seconds then shuts off but power light is still on?

PWI17LS285A, ACTUALLY THE CAPACITORS DOES NOT KEEP ENOUGH CHARGE TO KEEP THE LCD WORK...

so the big capicitor needs to replaced? 100µF 450V

Posted on May 17, 2009

SOURCE: My Sony SDM-HS74P display does not stay on.

I have the same issue and wrote the monitor off for now after checking all cables (and a different computer). The logic circuitry and panel are sill ok as I can see a faint image with proper lighting and close inspection, but no backlight makes it useless.

Since there are 4 lamps (CCFLs) on this model, the problem likely is not there but on the inverter circuitry driving them. This does not look easy to replace as this is part of a bigger board.

It looks like some could repair by changing a few (or even one) component on the board, but unless your are used to this (de-soldering and soldering back), you are kind of stuck.

I will attempt this if I have time as I hate junking 99.9% ok hardware. In your case since this is an old monitor you should just replace it if not technically (on the electronics side) apt.

Posted on Jan 04, 2010

Bud Martin

• 11361 Answers

SOURCE: I have an sdm hs74p monitor that repeatedly blacks

You may not have problem with the caps, but check them out any way. You should get good caps such as PANASONIC FM or FC series from DIGIKEY.COM
http://s807.photobucket.com/albums/yy352/budm/Sony%20SDM-HS73/

Posted on Apr 04, 2010