Re: benq fp767 problem 17 inch
its 532 (i put the multimeter on 2000k ohm) is that good or bad ????
benq fp767 problem 17 inch
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Re: benq fp767 problem 17 inch
2) STOP AND READ for one second.
3) You have been asked no less than 6 times (in posts 5, 7, 12, 16, 19, and 21) to check the picofuse PF751.
4) CHECK picofuse PF751.
5) Report the ohms measurment.Leave a comment:
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Re: benq fp767 problem 17 inch
the main fuse is ok because i can see the benq logo on the screen and my operating system windows xp but all dark without a lightLeave a comment:
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Re: benq fp767 problem 17 inch
collector -emiter= 198
collector- base= 493
base- emitor = 723Leave a comment:
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Re: benq fp767 problem 17 inch
1) where do you live?
2) do you know how to use a multimeter?
3) do you have basic electronics knowledge?
4) do you have a solder iron?
This forces the poster to enumerate each question and answer.Leave a comment:
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Re: benq fp767 problem 17 inch
ok q759+ q760 + q739+q740 gave me the same reading !!!! mybe its high voltage capacitors (blue). thank you guys
any suggetions?????Leave a comment:
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Re: benq fp767 problem 17 inch
Yes. The transistors and fuse Plain Bill listed are all involved in the inverter circuit, which is responsible for powering the lamps.Leave a comment:
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Re: benq fp767 problem 17 inch
Some people (like some of my co-workers :slap: ) when sent an email with 2 questions, always seem to only answer 1.
If you send each question in a seperate email, they magically get answered.
Kinda like when you post "please post pictures, AND tell us where you are"
you'll never find out where they are </hint>Last edited by smason; 09-03-2010, 10:23 AM.Leave a comment:
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Re: benq fp767 problem 17 inch
Put your meter on the diode test setting, then test each transistor.
Red on base black on collector
Red on base black on emitter
Red on collector black on emitter
then reverse red and black and repeat.
You should see a reading between approximately .400 to .800 in one direction, and open in the other.
I suspect you'll see at least one that's shorted. Also test the fuse. If one of the transistors shorted it will likely have taken out the fuse.
PlainBillLeave a comment:
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Re: benq fp767 problem 17 inch
Red on base black on collector
Red on base black on emitter
Red on collector black on emitter
then reverse red and black and repeat.
You should see a reading between approximately .400 to .800 in one direction, and open in the other.
I suspect you'll see at least one that's shorted. Also test the fuse. If one of the transistors shorted it will likely have taken out the fuse.Leave a comment:
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Re: benq fp767 problem 17 inch
ok guys i looked at my screen and see that there is a signal came to the screen (benq) logo and the windows xp) but without light mybe the problem with the power supply or the lamps ??Leave a comment:
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Re: benq fp767 problem 17 inch
<facepalm>
I think you need to re-read a few posts. We said "Good CLEAR pictures" and I asked do you have a multi-meter and know how to use it....
Luckily PlainBills newly modified eyes could magically read the component designations.
And seriously... 4:43 AM (MDT) and you're impatient for responses? Oy!
We'll help you, but really, try to help us help you.....Last edited by smason; 09-02-2010, 08:51 AM.Leave a comment:
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Re: benq fp767 problem 17 inch
how to test them on the multimeter and where to put the multimeter (where it should be on ohm or volt .............) ?????????????Leave a comment:
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Re: benq fp767 problem 17 inch
where are you guyssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
Q739, Q740, Q743, Q751, Q759, Q760, PF751. Test them and replace any that are bad.
PlainBillLeave a comment:
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Re: benq fp767 problem 17 inch
where are you guyssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssLeave a comment:
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Re: benq fp767 problem 17 inch
ok i will upload pics of the power supply and logic card thanks guysLeave a comment:
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Re: benq fp767 problem 17 inch
Excellent. Next step, post some photos, and we'll give you some tips on what to test.
I'm betting at least 1 bad transistor and pico fuse.Leave a comment:
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