Re: BenQ FP71G+ inverter problem (possibly).

sabre504 is absolutly correct, but i would just like to add if the fuse at pf801 is blown thats usually because one or both the fet's are shorted located at q805 & q812 they must be replaced as a pair even if one is ok as with the 2sc5707 transistors you must replace all four, you can get the full kit including the fuse for about $6 USD (plus postage) on ebay, I live in Australia but have my parts sent from the U.S (cheaper) I can post a link to the kit on ebay if you want. Also this problem can sometimes be caused by secondary caps...

Re: viewsonic vx2835wm no power

thanks for the reply
I've used a mixture of caps (all I can get from my local store) they are jamicon, suntan, samxon & ky they are all low esr 105 degree, I repair lots of smaller monitors & they have been ok in the past. I will try replacing all the small caps (but some may be a little harder to get, getting your hands on components in Australia is hard half the time I have to order them from the U.S or pay stupid prices from Australian distributors)

This is my first post so I will try to give as much information as possible.
I have a viewsonic vx2835wm with no power, no lights, nothing, it has a phihong psm217-404-h-r power board (seems to be the same as a hanns-g hg281d). I have replaced all of the secondary cap (two where swollen) but no change. I have a constant 338v across the main primary cap. With the controll board unplugged I get 5v at 5v rail but nothing else, with the control board connected I get 3.2-3.6v at the 5v rail 9-10v at the 12v rail & 21-23v at the 24v rail all fluctuating.
not sure where to go from here...

Re: New Members - please post your introductions here

hi hope this forun will educate me