Re: Fix for Benq FP737s 17" (Q7T3)

i forget it, i test the tft from about 2 hours and nothing burn.

Re: Fix for Benq FP737s 17" (Q7T3)

yes i know the differences on 2sd843, but beleive me i don't think that the inverter work at very high speed, it goes well with 843, and the answer is no, they don't get hotter, just a little more of the 5707 but really insignificant, one of the 843 gets a little more hotter than the other, i believe is the transformer that have some turn burn or somethin, is the transforemer of the original and only burnt transistor, (the first cause of the fail, but the temperature problems is not a problem the double diode ic702 and ic 703 (to-220) capsule,...

Re: Fix for Benq FP737s 17" (Q7T3)

it was the transistors, i can't believe that the seller give me those ''china'' replacements, i put other replacement 2sd843 it works well, there are to-200 capsule, but work fine, thanks to all.

Re: Fix for Benq FP737s 17" (Q7T3)

i tought that are originals, it said c5707 and under that 4j, maybe are defective from the factory?, the appearance are like the originals, did i mention are smk, i mean superfical mount, but i think this is not the problem, well thanks.

Re: Fix for Benq FP737s 17" (Q7T3)

ok thanks, but i tell you before that i swapped the transistors?, i mean i swapped with the old ones, swapped the inverters, you understand?, i put the old transistor in whichever inverter and works fine so neither capicitor nor transformers are the problem, and the new transistor gets very hot in both sides i mean in both inverters, the inverters (2) works fine with the old transistors and bad with the new ones, and of course that i put htem well, i mean the old ones don't get hot, so?, thanks again.

Re: Fix for Benq FP737s 17" (Q7T3)

hi, i have a benq q7c3 modell, it's very similar, the sympton is the same, tha fuse of 3a is blown, i checked the board and find one fet and one 2sc5707 shorted, the only difference in that circuits is that the fu9024n is a std10pf06, but the specification are practically equal, in fact the 9024 is a replacement of the st. Well i changed the three transistor, one std10pf06 and two 2sc5707 and the fuse, the monitor now gets on but of in 2 seconds, well i tested it hard, well at the end i put a 2k2 resistor from ground to the out of the tl1451...