Re: BENQ G2420HD no back light after few sec

Hi guys cant seem to find a new inverter for this board!

Was browsing this forum and came across this post (using LED board):
[url]https://www.badcaps.net/forum/showthread.php?t=76441&highlight=G2420HD[/url]

Could I do the same but use universal CCFL inverter board? like this one:

[url]https://www.ebay.co.uk/itm/Universal-CCFL-Inverter-LCD-Laptop-Monitor-4-Lamp-10-29V-15-22-Widesc-R7K2/324166443849?hash=item4b79d36349:g:2lwAAOSwl4lbvlnD[/url]

or

[url]https://www.ebay.co.uk/itm/Ultra-MINI-9x4cm-universal-ccfl-4-lamp-inverter-12v-25v-F-17-24-Inch-lcd-Repair/221484830012?hash=item3391864d3c:g:9~sAAOxy7S5SClL3[/url]...

Re: BENQ G2420HD no back light after few sec

@budM- I read this case: [url]https://www.badcaps.net/forum/showthread.php?t=40791[/url]

and tested the transformer 1 and 2 points you refer to here on my board-

Transformer 1- shows 2.06 at 20K reading
transformer 2 - i get no reading.

could this cause the 2 seconds to black and for the back lights to go off and not work?Re: BENQ G2420HD no back light after... /> and tested

Re: BENQ G2420HD no back light after few sec

@BudM- C701 is soldered

@dick_barton- I assume you want to know the chips number?

Q801 to 804 is A2790115
IC801- 0Z9933GN,CC780J 30,1139A

unless you mean the other side of the boards with the components on it.- see attached pics - will try and find CN701 and measure voltage -...

Hi all,

I have two BENQ G2420HD. One is working normally the other went dark after 1-3sec of normal screen- before not able to see anything with flash light on screen

I changed the the screen to the power board of the working monitor and screen worked fine.

I went and hanged all the capacitors on the power board (dont have means to test capacitors) only have multimeter and soldering iron.

Once the Capacitors were changed the screen comes on for 2-3 sec then goes dark- shining a light on it you can faintly see the display.
...

Re: New Members - please post your introductions here

Hi all,

My name is Daran and hoping to some advice on fixing some stuff. Like trying solve and learn ways of fixing electronic stuff and noob DIYer. But happy to.read and get informed.