Thank you very much for your response. That is actually exactly how I managed to get it open after figuring out that that piece was removeable.
I had worked with televisions and computer monitors before and knew the dangers, but am not an expert by any means. I did discharge the flyback to a good ground before I proceeded poking around. After looking around on the pcb and finding no signs of burned board, blown caps or resisters or any other bulging or charred components, I made use of google. First page worth reading was.. http://www.repairfaq.org/REPAIR/F_flytest.html This was a pretty good page written in plain english explaining lots of stuff about flyback transformers (or Line Output transformers). It talks about their introduction, how they work, how they fail, etc. The next page I found was this... http://www.tsty918.com/monitor/m010.htm It's an archive site of monitor related repair questions and answers. If you search for 6496 you will find the question someone asked about these monitors failing, and that it's a "stanard fault". I don't believe everything I read on the internet, but this info, and the response seemed pretty accurate. After reading it, i proceeded to locate all of the components that are listed on the board to double check and see if any of them are duds. It's hard to actually test stuff when it's still inplace. Or in the case of IC501, having no idea how to test it at all. After getting tired, and at the end of my knowledge about monitors, I put it back together. Thankfully, there are no extra screws. Anyways.. If the most common problem is only the flyback, since I have the part number, and am handy with an iron, I'll head over to one of the elecronics shops in town and see if they have one, or can order one in for me. Another question. In the units that you have repaired, is it always only the flyback that is toast? Or is it common to take other components down with it. I would assume from your reply that it's just the flyback. But I would rather ask, and be able to check those other components also. -nils On Sun, Aug 17, 2003 at 10:46:32AM +0100 or thereabouts, Steve Bell wrote: > On 17/8/03 5:47 am, "G-List" <[EMAIL PROTECTED]> wrote: > > > Date: Sat, 16 Aug 2003 22:38:37 -0700 > > From: Nils <[EMAIL PROTECTED]> > > Subject: Opening at 17" Apple Studio Display > > Message-ID: <[EMAIL PROTECTED]> > > > > Hey all.. > > > > My monitor isn't working, and i'm trying to open > > it up to see whats going on. I have the base and > > bottom plastic panel off, but can't figure out > > how to get the rest of the plastic casing off. > > > > Any ideas? > > > > -nils > > You simply grip each side of the monitor low down on each side of the > coloured strip that wraps around just behind the front. Ensure your finger > nails are engaged under it, then pull hard. This will pull away the wrap > around strip exposing more screws, its only clipped to the case. > > Unless you are a repair tech it won't do you any good, as even if you then > removed the metal screening and base plate you would not be able to detect > any fault just by looking. In my work I've opened up around 40 of these now, > both Graphite and B&W. All but one had either defective flyback transformers > or flyback induced faults making the monitor unrepairable. > > These monitors were made by LG for Apple and have only one weak spot that > makes them very unreliable, the flyback transformer. It can cause these > faults: > > Loud snap/arcing noise, image fades, comes back dark, enlarged and out of > focus, corrects itself over a few seconds. This can happen once every few > months or almost immediately its turned on. > > As above, then monitor fails to power on. Arcing damages internal circuitry. > Once this arcing also zapped a G4 video card. > > Flyback transformer fails shorting B+ supply to it. B+ regulator normally > supplies around 180V to flyback, drops to a few volts. Power LED on, no > display. > > I've only changed 5 flybacks in these for maintenance contract customers, > most users don't want to pay and buy new. I'm in the UK, and the flyback > cost was around 90 gbp ex VAT (EU sales tax, source was a supplier in > Netherlands). > > Note, in this monitor amongst other things, the flyback generates around 26 > KV for the CRT, an area not to me messed with unless you know what you are > doing. Even in a dead state, there is a possibility of 320 VDC present due > to charged capacitors. > > Steve Bell -- G-List is sponsored by <http://lowendmac.com/> and... 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