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NEC FE750 17" PC occasional field collapse

Hello all,

Can anyone help me as to how or where to locate a fault in my NEC FE750 monitor (.25mm dot pitch / flat aperture grille tube). Every few hours, (it's done it about 5 times now over the past few days), I get loud "Clunk" sound as if it's just been switched on or off - picture field collapses to a bright horizontal white/magenta line, (pretty sure it's not white), field collapse lasts for just a second then "clunk" again, and Windows desktop appears in the middle of a degauss cycle then it's fine again for hours.

This NEC monitor was in storage from new along with several others for years, I've had this one for about a year, tube is like new. Shame to have chuck it for the sake of a disc capacitor ...if that's all that's wrong !!

...any pointers, or referral to a good monitor repair technician appreciated.

regards, Richard

Reply to
RJK
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You've probably got a cracked solder joint in there somewhere, perhaps in the vertical or power supply area. Don't keep using like that or you'll likely cause further damage.

Reply to
James Sweet

Thanx James, Perhaps tommorrow I'll whip off the cover and take a look around it with a bright light and a magnifying glass, if I can't spot anything with the naked eye. Tiz all so time consuming ...so many other things to do !

regards, Richard

Reply to
RJK

...I whipped off the back and removed the tin shield, blew it out with my old faithfull electrolux "cylinder" vacuum cleaner - (where you can connect the hose on a hole at the top to blow - bought it at a boot sale for £5 several years ago....stripped cleaned it and put a tiny drop of oil on each motor bearing....marvellous for blowing out PC cases . / PSU's etc.)....the pallaver to get the board out of the thing is a major time consuming joke, so I reassembled it, I'm going to throw it away if it plays up and get a LCD monitor from my favourite vendor

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BTW ...since blowing it out, I haven't had a single field collapse !! ...tracking or arcing via dust ??

regards, Richard

Reply to
RJK

...STILL no collapses !!!!

...am pretty sure now that it must have been tracking across dust, there was some pretty grim black looking powdery dust in there - not excessively thick, ...very little "household/skin" dust. ...or did I disturb that dry joint in there, in a beneficial fashion ? !!! :-)

regards, Richard

Reply to
RJK

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