Hi i have a benq t701 there is power going to the board but no display if i look clos i can see a flicker could the ballest gone and if so how can i repair or replace if.
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go to esservice.com and get the manual from there will be easier as the transistors are directional i believe they are 2sc5707s from memory but you will need to check the transformers and the 2 filter caps on either side of them as if they are faulty will blow transistors.
it's not the lamp. if you've replaced the cords and still have the problem, reset the settings to factory default to make sure the resolution matches. if still not ok, there may be an issue with the main board.
If you can, check the display settings.
Some graphics cards have an option for dual monitors.
Sounds like the card is seeing only 'monitor 2'.
If you have more than one monitor port, try plugging both monitors in.
If no luck, you may have to boot into BIOS at power-up and configure from the menu.
But be careful not to fiddle with unknown settings in BIOS - this is the 'nerve center' of the computer and could cause total digital catastrophe.
If not sure, don't.
Or get expert to help re-configure.
Hi Abadir,
It really sounds like your back light has bit the dust. I can't always see stuff on the LCDwhen the back light is out. Check in with LCDrepair.net for parts, and repair of your monitor. I truly hope this helps. Good luck.
I had a similar problem: the backlight on my Benq T701 only functioned for a couple of seconds every time a turned the monitor on and then the backlight switched off (sometimes in two stages). An electronics guru at work said with those symptoms the transistors rarely were the problem and I just needed to resolder the connections of the high voltage coils onto the PCB. On visual inspection those solder connections seemed ok, but when I tried to reflow the existing solder at one connection I spotted the problem: just a thin surface layer of solder was present and I had to add solder to fix the problem. The 4 coils each have 6 leads on one side and 2 on the other. I only soldered the connections on the side with 2 leads. In just 30 minutes and without buying parts the monitor is now up and running again.
if your monitor is not connected to a pc, then it cannot find a vga signal input and therefore go into power saving mode, which is indicated by the orange light, but as soon as you connect to the pc and power on the light will go green and the monitor will power up.
same problem
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