Viewsonic VP211b

[PlainBill]

Re: Viewsonic VP211b

Is there a letter on them, or a warning to 'Replace only with x Amp fuse'?

PlainBill

[iusvir]

Re: Viewsonic VP211b

Hey Bill.....


I am playing with one of these right now and the fuses on the inverter are toasted...... What size are they? Do you or anyone know?

Keith

[EGuevarae]

Re: Viewsonic VP211b

just got my hands in one of those units, and the problem ended up being the logic board (besides the recap). I have some parts for those units, so I just swapped it and that was it. I will find time to troubleshoot the logic board in the future, but for now, that was the solution...

[PlainBill]

Re: Viewsonic VP211b

My VP211b produces a black screen upon powering up. The green power light comes on and after 30 seconds the green light switches to orange "power save mode". Note, I cannot access the OSD. I have recapped the power supply thinking that was the issue. But monitor responses they same way it did proir to the recap.
Any ideas as to what the problem may be?

Been there, done that, never got the tee-shirt. Inverter power is routed through the signal card. The inverter has two (three?) fuses. If either is open, the backlights never come on.

I used a bench supply to power up the side with the blown fuse and verify it worked properly. Another option would be to hook an 1157 automotive light bulb across the open fuse. Of course, there is always the possibility of another problem.

PlainBill

[alexanna]

Re: Viewsonic VP211b

First, let me correct my original post. Prior to recapping the power supply the VP211b responding as follows: Black Screen, No OSD, Power light green then switches to orange. After recapping: Black Screen, No OSD, green power light steady and no longer switching to orange. Note, power light stays green on one of the signals when I switch to the second signal input option "via toggle switch" the light turns orange.

Set the switch to where you get a steady green light indicating is good signal.
It may be difficult to see, but with a light shined on the LCD can you see an image?
Eventually you are going to need to provide photos of your power supply, and possibly the signal card and inverter if it is separate.
The members that try to help with LCD problems prefer that you would use the Managed attachments feature when you provide photos. A straight down shot without a flash, so the writing on the board is readable is best.

[assetrecycle]

Re: Viewsonic VP211b

I do have the monitor connected to a computer so I think I have a signal going to the monitor. However, I have not verified the cable nor established the monitor in XP's system data.

[assetrecycle]

Re: Viewsonic VP211b

First, let me correct my original post. Prior to recapping the power supply the VP211b responding as follows: Black Screen, No OSD, Power light green then switches to orange. After recapping: Black Screen, No OSD, green power light steady and no longer switching to orange. Note, power light stays green on one of the signals when I switch to the second signal input option "via toggle switch" the light turns orange.

[alexanna]

Re: Viewsonic VP211b

Do you have a signal going to the monitor?

[assetrecycle]

Re: Viewsonic VP211b

My VP211b produces a black screen upon powering up. The green power light comes on and after 30 seconds the green light switches to orange "power save mode". Note, I cannot access the OSD. I have recapped the power supply thinking that was the issue. But monitor responses they same way it did proir to the recap.
Any ideas as to what the problem may be?

[PCBONEZ]

Re: Viewsonic VP211b

I had to bore a couple of holes in a PCB once and the ship was short on drills.
Couldn't get my hands on one for days. Waiting list.
I made a bow drill in the fashion of a fire starting kit [pic below] and used that to spin the bit.
Took a while, but not as long as the waiting for a drill.
.

[shagg]

Re: Viewsonic VP211b

Heated screwdriver, I like it! When removing bad caps before, my iron was too fat for some of the job, so I got a thick sewing needle in some pliers and heated it up with a little propane torch, worked a treat

[jetadm123]

Re: Viewsonic VP211b

We use old toothbrushes and Q-Tips for removing rosin from boards after soldering. And I read one enterprising member on this forum use a heated screwdriver as a soldering iron! I'm waiting for someone to pull a "Macgyver" and make a ESR meter out of a paperclip and 9V battery.

[PCBONEZ]

Re: Viewsonic VP211b

And dissecting picks are for dissecting and guitar picks are for picking guitar strings.
.
The proper tool for a job isn't in it's name it's in what it does.
.

[PlainBill]

Re: Viewsonic VP211b

They are supposed to be in the tool box.
.
I suppose if you mix your tools and utensils like that you could use the putty knife in the kitchen drawer to spread things on toast.
It's probably a better tool for that anyway.

My shop teacher always insisted we use the proper tool for the job. Butter knives are used to spread butter, putty knives to apply putty. Every time I get out the guitar picks I check over my shoulder to make sure he isn't watching.

PlainBill

[PCBONEZ]

Re: Viewsonic VP211b

They are supposed to be in the tool box.
.
I suppose if you mix your tools and utensils like that you could use the putty knife in the kitchen drawer to spread things on toast.
It's probably a better tool for that anyway.

[PlainBill]

Re: Viewsonic VP211b

Butter knifes.
.

Tried that. Next day the toast tasted funny.

PlainBill

[PCBONEZ]

Re: Viewsonic VP211b

Butter knifes.
.

[PlainBill]

Re: Viewsonic VP211b

How did you take this thing apart? I have a bad power supply. Have removed the 4 screws in the back but don't know what to do from here. I don't want to ruin this thing. Best monitor I've ever had. Yes, I bought it brand new way back when. Expensive(!).

Any advice would be fantastic (other than 'buy a new one'.)

This monitor is the most frustrating to open that I have ever dealt with. You open it with a pick - or perhaps picks would be more correct. The two halves of the shell fit together very tightly. For tools I suggest a dissecting pick or other small pointed tool, and a dozen or so guitar picks.

Start at the bottom of the shell. Work the dissecting pick into the crack between the two halves. As I remember, the back slides over the front. Then work your way all the way across the bottom, inserting guitar picks. You will hear the catches release. Next, start at the bottom of one side until you get near the top, then switch to the other side and do the same. FINALLY you will be able to slide the back toward the top, releasing all the catches on the top edge and lifting the back off. At that point, sit down and have a beer, you've earned it.

And a suggestion - don't put the back on until you are very certain you have fixed it.

PlainBill

[aglasser]

Re: Viewsonic VP211b

I picked up this oldie as a Freecycle freebie. Replacing an open fuse in the inverter fixed most of the problems, so I put it to work on my desk. Gradually I became aware that the display was not working properly. Specifically, on a dark green background two broad (about 1") lines ran 2/3rd of the way across the screen. It was not noticeable on a white background, but was barely visible on a blue background. The first cause that came to mind was the CCFL backlights (something had to blow that fuse, right?)

Opening up the case and isolating the LCD panel itself was easy, but now I'm into unfamiliar territory. The panel seems to be built on a stainless steel frame. Everything seems to be held in place with a white plastic back frame with four 'catches' on each side. These latch into slots in the front frame. There are four screws of unknown purpose on the front of the metal frame. Of course, there is also the cover over the electronics section of the display.

So how do I disassemble this without breaking something?

Thanks,

PlainBill

How did you take this thing apart? I have a bad power supply. Have removed the 4 screws in the back but don't know what to do from here. I don't want to ruin this thing. Best monitor I've ever had. Yes, I bought it brand new way back when. Expensive(!).

Any advice would be fantastic (other than 'buy a new one'.)

[PlainBill]

Re: Viewsonic VP211b

Well, i was able to solder the caps on the board but I could not fully remove the "power supply board". I had to turn it upside down as far as i could and solder this way.

Glad you succeeded. The AC input connector and power switch are combined into a single module which snaps into the frame. There are two tabs at each end of the module that latch it in place. To remove the board completely you would have to compress the tabs, and slide the module back out of the frame. Then the wires will go through the slot in the frame. It's a real pain to do; the way you did it is easier.

PlainBill