Re: Benq FP731
Hi,
I think it's time for a new monitor!
In attempting to gain access to the lamps, one of the ten ribbon cables to the screen tore away!
Even though I was especially careful as I knew they were delicate, to my disbelief it still happened.
I would therefore like to thank PlainBill & alexanna for their help.
Maybe next time I'll do better.
Regards,
W1ll.
W1ll
Member
Last Activity: 09-30-2024, 05:42 AM
Joined: 09-16-2011
Location: UK
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Re: Benq FP731
Hi,
I've substituted the bulb with a domestic 3A fuse.
This time the lights only come on once instead of twice and then go out.Leave a comment:
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Re: Benq FP731
Hi,
I'm still using the bulb as I haven't ordered a replacement fuse yet.
I'm waiting to see if I need to purchase anything else.Leave a comment:
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Re: Benq FP731
Hi,
I don't have any Parts that I can swap.
The lamps work, although briefly. How could it be both of them at fault?Leave a comment:
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Re: Benq FP731
Hi,
I am no nearer solving this problem now than I was a week ago!
Everything listed so far has been done, but still the 2 secs to dark persists.
My question is how should I progress from here?
Will.Leave a comment:
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Re: Benq FP731
Hi,
The Fet's were correctly fitted when I conducted your latest tests.
I'm still left with exactly the same problem though, 2 seconds to lights out.
If I have to remove them again I think the tracks are going to break up.Leave a comment:
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Re: Benq FP731
Did you have the CCFLs hooked up when you did this test? Did they light up? What is the current rating of the lamp you are using?
Hi,
Both CCFL's were hooked up during the test and they both lit up along with the auto bulb that I used to bridge the fuse.
It's rated at 21W/5W. (Stop & tail), between 0.5A & 2.4A.
Only the lower rated filament - 5W would light.Leave a comment:
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Re: Benq FP731
Hi,
Although I hate to agree with you, I think Q743 was reversed when the picture was taken!
Both FET's aren't in the board at present, due to the latest tests from PlainBill.
I think I'll start over again from scratch with the advice given.Leave a comment:
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Re: Benq FP731
Hi,
After removing both FU9024N. One at a time and retesting.
The bulb lights for 2 seconds when the middle one is removed but doesn't light when the one near the edge of the board is removed.
Are we getting any nearer to solving this?Leave a comment:
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Re: Benq FP731
Hi,
After testing the bulb does glow brightly at first for a couple of seconds then goes out followed by one brief flash, then nothing.
I will remove 1 mosfet FU9024N, but is there a test I can do with my DMM?
Not sure about these little beauties.Leave a comment:
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Re: Benq FP731
Hi,
These 6 components plus the fuse have all been renewed.
All tests show as being open.
No reading from the fuse to diode either.
Items marked in orange were CHN D10PF 06 31W417, but were replaced with FU9024N.
Told these were compatible.Leave a comment:
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Re: Benq FP731
Hi,
There is 36.8V on the power supply side of the fuse, 0V on the inverter side.
0.04V on the first lead (black).
3.8V on the second lead (brown).
Caps are Lelon A410(M) A419(M)Leave a comment:
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Re: Benq FP731
Hi,
Here are the images as requested....Leave a comment:
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Re: Benq FP731
Very dim as in can just about see what's on the screen with a bright light being shone onto it.Leave a comment:
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Benq FP731
Hi all,
My first post and straight in with a question you're all probably thoroughly fed up with but is still a huge b***ache to me.
It's the very dim screen from start off. I've bought the kit with the fuse and 6 trannies. But still the same. I've re-soldered the t/formers and power trannies. Everything is just the same.
I'm on the edge of my understanding, but am real good at following instructions.
Regards,
Will.
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