Viewsonic VX2255WMB screen goes off

[labrea]

Hi guys,
I own a Viewsonic VX2255WMB monitor, it's about 2 years old, monitor was OK until yesterday..
Screen comes in pinky color when I power it on then it goes to black screen after seconds, light still stays solid blue,
I disassembled monitor, took apart power supply, didn't notice any bad caps, what else could it be?

[jetadm123]

Re: Viewsonic VX2255WMB screen goes off

Hi guys,
I own a Viewsonic VX2255WMB monitor, it's about 2 years old, monitor was OK until yesterday..
Screen comes in pinky color when I power it on then it goes to black screen after seconds, light still stays solid blue,
I disassembled monitor, took apart power supply, didn't notice any bad caps, what else could it be?

My guess would be that one or more of the CCFL's has failed, as evident by the "pink" hue.

[PlainBill]

Re: Viewsonic VX2255WMB screen goes off

Hi guys,
I own a Viewsonic VX2255WMB monitor, it's about 2 years old, monitor was OK until yesterday..
Screen comes in pinky color when I power it on then it goes to black screen after seconds, light still stays solid blue,
I disassembled monitor, took apart power supply, didn't notice any bad caps, what else could it be?

One or more bad CCFLs. The pink color is typical of a CCFL at the end of it's life.

PlainBill

[labrea]

Re: Viewsonic VX2255WMB screen goes off

Actually, I missed this part,
Pink color came up one or two months ago and pink color last only 4-5 seconds, after that I had no issue, pink color never lasted longer than 5 seconds..
Monitor turns to black screen since yesterday.
still could be CCFL?

[jetadm123]

Re: Viewsonic VX2255WMB screen goes off

Actually, I missed this part,
Pink color came up one or two months ago and pink color last only 4-5 seconds, after that I had no issue, pink color never lasted longer than 5 seconds..
Monitor turns to black screen since yesterday.
still could be CCFL?

It just means that the CCFL was just starting to fail back then. Now, it's completely failed.

[labrea]

Re: Viewsonic VX2255WMB screen goes off

It just means that the CCFL was just starting to fail back then. Now, it's completely failed.

worth to fix it? I haven't deal with CCFL before.

[Mad_Professor]

Re: Viewsonic VX2255WMB screen goes off

It requires you to dissemble the lcd panel to gain access to ccfl. Some ccfl slide out others are lay-in.

There's screws on the sides then the metal housing pulls off but you can not sever the connection to the tcon board, but there are screws on the tcon board to mount on metal housing. You'll want to be-careful because it's an LCD and it sensitive to pressure and can easily be damage.

Anyways I have a VG2230WM with a chi-mei panel that the TCON board or the bonding of the lcd itself to the tcon has gone bad and plus a transistor on the inverter has gone bad too so the unit does not stay on and the right side screen is not useable, But the bulbs should be good.

I'll try to harvest them tomorrow and give you the diameter and length with the leads and see if they will work for ya.

[jetadm123]

Re: Viewsonic VX2255WMB screen goes off

worth to fix it? I haven't deal with CCFL before.

Well, it depends how comfortable you are with taking things apart. If you don't like the idea of attempting to fix it, then you can always part it out or sell it as is and use the money towards the purchase of another monitor. You can purchase new ccfl's through ccflwarehouse.com.

[labrea]

Re: Viewsonic VX2255WMB screen goes off

I think I'll give a shot.
I am not familiar with ccfl as I said, what type/kind/model of ccfl should I buy? any chance paste a direct link?

thanks

[retiredcaps]

Re: Viewsonic VX2255WMB screen goes off

any chance paste a direct link?

Call ccflwarehouse.com. They are very helpful over the phone.

[mwkendall1]

Re: Viewsonic VX2255WMB screen goes off

I have the same problem, except did not notice any "pink". (someone else was using it at the time)
Yesterday, Monitor went blank, pushed power button, came back on. Went off again, same thing. Then went off several times in 10 min, then stayed on for a few hours. Turned it off, went to bed, this morning would not come on, not even power light.

Yes this is a Viewsonic VX2255WMB.
Here are pics of board.

[selldoor]

Re: Viewsonic VX2255WMB screen goes off

Ok please can you re attach the pics as jpgs.

First - no power - off 5 minutes -unplugged can you test the fuse near the mains socket

[mwkendall1]

Re: Viewsonic VX2255WMB screen goes off

sorry here they are, caps all look good.
oops sorry, those were from diff computer.

[mwkendall1]

Re: Viewsonic VX2255WMB screen goes off

Ok please can you re attach the pics as jpgs.

First - no power - off 5 minutes -unplugged can you test the fuse near the mains socket

It did not just go off suddenly, went off, (power light stayed on solid, no flashing) hit power button, came back on, a little while later did it again, same thing. Then a couple hrs later it went off several times in 10 min, then stayed on for about 4 hrs, turned off, went to bed, got up, did not come on at all no power light, nothing.

[mwkendall1]

Re: Viewsonic VX2255WMB screen goes off

here are right ones

[jetadm123]

Re: Viewsonic VX2255WMB screen goes off

With the monitor unplugged, try checking the main fuse, F801, below the power connector. You should read approx. 0 ohms on your meter. If the fuse reads good, plug in the monitor and measure the voltage across the the large blue 150uf cap. Be careful as it's high voltage. You should read approx. 165VDC.

[mwkendall1]

Re: Viewsonic VX2255WMB screen goes off

cool, thanks I will tomorrow and let you know