tft always in standby mode

Maybe try a can of component cooler on parts until you find the part/area that is faulty. My $0.02.

-Brian

In these monitors I have been sometimes lucky and found capacitors reading high in ESR. You will need an ESR meter to test them. You can purchase SMD type capacitors from most of the major electronics parts suppliers. You will need a proper soldering iron and good soldering skills to change any of these caps.

Farther than that, would not be possible do service at home. The warranty service people change the boards to fix these monitors.

--

JANA _____

Recently (as I guess is expected) it stopped working and is now always in this "half-booted" mode with the power LED lit as if in standby mode. Anyway, after some phone calls I discovered that Dell doesn't repair monitors, and neither do the generic repair companies ("we don't have a service agreement with Dell or with Dell parts").

So, I have now opened the monitor up myself looking for evident stuff like burned caps and such - none found, but yeees there are many chips and micro-components in there! But while doing this I saw that several of the circuit boards are branded Acer.

My question to you pros is what would be my best shot; trying to find an Acer technician, try to find Acer parts and replace boards myself, bin the monitor, ...?

Cheers Mike

Hi Brian, the monitor doesn't function even when cool any longer, but you reckon that the broken component will function if made really cool? (I might start with putting the monitor outside for an hour or so, only

+5C here ;-) Any suggestions on which components are usually temp related and which are not (to avoid unnecessary tests)? Chips, caps, ...? Thanks/Mike

Hi JANA,

Ok, sounds interesting. And have you seen this on monitors with the kind of problems I'm having? (Ie, is a broken cap a probable cause?)

Well, that was one of the tricky parts as Dell doesn't sell parts for their monitors, not to anyone. Is it easier to get parts for Acer monitors and/or can I assume that my Dell monitor is an Acer design from top to bottom, or did Acer just produce the boards according to Dell specs...?

Thanks/Mike

I cannot answer the question about the product relationship between DELL and Acer. I know that DELL subcontracts to many of the big monitor manufactures for their monitors, as like all their other devices. DELL themselves are not a manufacture.

I found that with all these computer monitors, it is almost impossible to buy original parts or service manuals for them.

The most common cause of failures with these monitors are capacitors going high in ESR. The surface mount capacitors are available from Digikey, and other suppliers like them. You will have to know the size number, the microfarads, and the voltage rating of the ones you need in order to place an order. Or, you can get their catalogue, and try to identify the capacitors yourself.

If the monitor is used with defective caps, eventually this may lead to other failures. Also, with age other types of components can start failing, which leads to an unreliability factor after some time.

As for most of the IC's and non generic types of components in these monitors, they will be impossible to purchase from any of the electronics parts suppliers. The manufactures of these components will not sell directly to anyone who is not the contractor who made the original purchase.

The manufactures of these monitors do not service any of their monitors at the component level. They put in new boards, and then re-calibrate using an interface system that connects to the monitor.

After warranty, most of these monitors do not pay to service, unless it is a high end monitor that is very costly to replace.

--

JANA
_____


 wrote in message 
news:1145271520.414834.273750@i39g2000cwa.googlegroups.com...
Hi JANA,

> In these monitors I have been sometimes lucky and found capacitors reading
> high in ESR.

Ok, sounds interesting. And have you seen this on monitors with the
kind of problems I'm having? (Ie, is a broken cap a probable cause?)

> Farther than that, would not be possible do service at home. The warranty
> service people change the boards to fix these monitors.

Well, that was one of the tricky parts as Dell doesn't sell parts for
their monitors, not to anyone. Is it easier to get parts for Acer
monitors and/or can I assume that my Dell monitor is an Acer design
from top to bottom, or did Acer just produce the boards according to
Dell specs...?

Thanks/Mike

Thanks for your detailed reply JANA!

Well that sounds promising!

An equivalent monitor is priced from around $600. Do you have any idea in what price range a replacement board would be, in case I would find a match among Acer's parts? (So I don't waste time looking for a part that will be too expensive anyway...)

Cheers Mike

Stick it in your freezer for at least 12 hours, see if it comes up OK. If not, toss it. If it does, ;-) , just don't turn it off.

For boards, lcdpart.com sells inverter boards and Norris Parts on eBay sells logic boards. I've worked with them and they are both pretty solid. If I were in your shoes, I'd buy a working cracked screen monitor of the same model on eBay and swap in the good boards. I've purchased cracked screen monitors for as low as $15 just to get the working boards and the backlite bulbs.

Maybe its just a coincidence but I'm starting to see a number of 2000fp's on eBay that just "died" or have other circuit related problems. That might be a signal to stock up on boards or to just trade up to something newer. Or it might not. ;-)

Dave

That was very useful info - great! Looking at Norris' failure descriptions on eBay I now know that it is my logic board that is broken. Couldn't find any broken monitors on eBay right now so might go for one of Norris's boards.

THAT was very interesting info. It will for sure influence my decision whether to fix or ditch this unit...

Thanks Mike

Actually not a bad idea. Just for curiosity; why such a long time? (I just looove scientific explanations ;-).

If it is, as the other posts suggest, high leakage electrolytics, then you want the electrolytics' electrolyte paste to be completely chilled. Since this is aqueous, dense paste it has a relatively high heat capacity and at best only moderate heat conductance. 12 hours is usually ong enough to complete freeze chicken pieces, so it should be more than adequate for electrolytics, none of which in such a device should be as big as chicken parts. Now if it were old DEC power supplies, for example, I'd suggest longer, they often had electrolytics as big or bigger than a 40mm round, which would have longer characteristic cooling times.