Viewsonic VX2235WM........ 10 Seconds to black

[Robert Ashton]

Hi everyone, new member here

Before I start I just want to say I have learned so many things just hunting around this forum Thank You.

OK,

I have a Viewsonic VX2235WM that I bought new at costco about four years ago.

It has the DAC-19M009 "Inverter Board" or power board..... I don't know actually what to call it.

It had the typical 2 seconds to black that everyone talks about.

So, I cracked her open and found the same thing I read all over net......

BADCAPS!.... All CapXcon or Crapcon as you guys like to say. LOL


So I ordered a kit..... from Canada? lol,

Anyway, it showed up last friday Rubycon, Nichicon and Sanyo caps

I replaced all the caps and put it back together, hooked it up to one of my machines...... and Bingo!

It fired up just like new, for about ten seconds

Then it went night night...........

I scoured the net trying to figure out what was wrong, I honestly think after looking all over this forum the problem has to be the "Inverter IC Chips"... I have a crappy sears analog meter but I used it to check the Ohms that a member named Bill told someone else to check.


That made me think they were bad, but I can't find any new ones.....

One is P605 BZ6G1T, the other is P605 BZ6031


I'm sorta new to this "Electronic Wrenching" forgive me if I sound stupid,



R. Ashton

[bammbammfran]

Re: Viewsonic VX2235WM........ 10 Seconds to black

You should have changed the small green cap that is near the largest cap while you were at it.
Try changing your 4 bulb plugs configuration so that the two bottom bulbs are on the two bottom plugs of the power supply and 2 tops to 2 tops.
If still blacking out, check the voltage on F200 fuse while it is powered on and receiving a signal. (you can use the largest heatsink that is right next to the fuse as a ground source)

[Rtech]

Re: Viewsonic VX2235WM........ 10 Seconds to black

AOP605 is the correct Part code, usually available on Ebay if necessary.A standard fault on these Boards

[Robert Ashton]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Thank you my friend,

I did find the AOP605 chips but didn't want to buy them because the numbers didn't match.......

I will order them and hopefully this monitor will be back in action


Oh, and Bammbamm,

I appreciate your reply, thanks for the help but I checked all that and it's all good.

I think Rtech is right, those AOP605's cooked off when my caps blew?


All I know is that I had to walk away because I was pulling my hair out and almost grabbed my 870 and shot the damn thing..........

LOL.....

Thank You my friends

[bammbammfran]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Might be right but my gut says ccfl bulbs since it worked for 10 seconds unless it wouldn't light back up after it blanked out

[Robert Ashton]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Sorry not to get back to you guys,

I have been busy and put that monitor on the back burner until yesterday.


bammbammfran:

I don't think the ccfl bulbs are bad, after I replaced the caps with the kit it would light up bright and run for ten seconds before it went dark...... I could turn it off and on again over and over and it would light up like brand new for ten seconds.

But what do I know, maybe you're right

I did check all the wires and connections I could see to the cclf's and nothing looked burnt, cracked as far as I could tell.

I did take your advice when I ordered the two AOP605's last night and ordered a new start cap...

Only I had to order ten of them! LOL Ten Rubycon 50v 22uf 105c when I needed one

Oh well, I bought everything from the same vendor with free shipping for $ 9.38.....

Guess I have to find a few more monitors that need that cap

Parts should be here on wednesday, I'll report back with the results.......


R. Ashton

[budm]

Re: Viewsonic VX2235WM........ 10 Seconds to black

So you took the LCD panel apart to inspect the wires and the lamps?
Do you have test lamps?

https://www.badcaps.net/forum/showth...er+testing+cfl

[Robert Ashton]

Re: Viewsonic VX2235WM........ 10 Seconds to black

So you took the LCD panel apart to inspect the wires and the lamps?
Do you have test lamps?

https://www.badcaps.net/forum/showth...er+testing+cfl

No, I didn't take it apart.....

I just inspected all the wires and connections I could see.

I don't want to come across as some smart ass, I read all the threads I could find with the DAC-19M009 and checked everything I could find with all the problems everyone had,


I have no test lamps, but I did switch the lamps around and there was no difference at all.

[Robert Ashton]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Thanks for your help budm...

I still hope and think those AOP605's and that start cap are the the problem.

[bammbammfran]

Re: Viewsonic VX2235WM........ 10 Seconds to black

you can try to plug in one bulb at a time and see how long each one stays lit and see if they all look about the same brightness
If the wires are long enough, try each one in the same plug
This test usually will only point out one that is really bad

the reason I feel it might be bulbs, is number one , because it is a 22"
and usually when transistors fail, they won't usually last for 10 seconds
FYI: bulb wire issues usually are on the opposite end of where the wires enter the screen, so you can not see them easily

[budm]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Example of bad lamps and bad lamp wiring:
http://s807.photobucket.com/user/bud...?sort=3&page=1

[Robert Ashton]

Re: Viewsonic VX2235WM........ 10 Seconds to black

You are both right,

The parts came today and I replaced the two transistors and the starter cap....... no change

I took the plunge and opened up the display, it was surprisingly easy as long as you are patient and gentle.

One of the blubs out of four is burnt....... the wires are fine but one is dead, guess I'll order two new ccfl's.

I'm going to make a test light out of a 13 watt sylvania to make sure everything else is ok.


Thanks guys

[Agent24]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Biggest problem is dust, everything else is fairly easy though when you're careful with it.

The CCFLs are easy to snap. I broke one when replacing some the first time. Take good care with what you're doing there too. I was too busy concentrating on soldering the wires correctly!

[Robert Ashton]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Well, what do you know......

Just made a test light, hooked it up and it has been running bright without a flicker for half an hour

Sweet!

Now I have to find some ccfl's

[bammbammfran]

Re: Viewsonic VX2235WM........ 10 Seconds to black

good to hear

[budm]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Nice, having test lamps help saving time narrowing down the problem.

[Robert Ashton]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Thanks everyone

Anyone have any advice on where to buy ccfl's ?

I guess I need at least one set with the wires and plugs because I cut the wires short to make my test light

[Agent24]

Re: Viewsonic VX2235WM........ 10 Seconds to black

You can find a lot on eBay. I bought from ccflwarehouse.com before, but some here say they are a ripoff.
But IIRC I bought through their eBay store which was cheaper.

[c_hegge]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Just so you know, those capacitors are fakes. They will probably be no higher quality than the original CapXons.

[Robert Ashton]

Re: Viewsonic VX2235WM........ 10 Seconds to black

Fakes? How can you tell?

The vendor I bought them from has a 99% approval rating.......

Well, that sucks

Should I replace them, or just deal with it?