On 7/8/03 1:59 am, "PCI PowerMacs" <[EMAIL PROTECTED]> wrote:
> Message-ID: <[EMAIL PROTECTED]> > Date: Wed, 6 Aug 2003 21:13:28 -0400 (EDT) > Subject: Trouble with Apple 17" Display > From: "Jesse R Lucke" <[EMAIL PROTECTED]> > > Hello, all! > > My current monitor is an Apple Multiple Scan 17 Display, #M2494. You know, > beige Trinitron behemoth. > > It, like my aging Mac, has a few minor problems. The stickers from the > previous owner I'll overlook (hey, when you get it for $5, you get it for > $5!), but it does something quite inexcusable. For the first 15-20 minutes > (sometimes MUCH longer) after I boot the system up, white and pale areas > have a green "shadow" off to the right, and the color is rather off. As it > warms up, it flickers in and out of this state until it finally settles > (likely after a few sharp licks to the side or top) into the beautiful, > crisp, color-corrected delivery we've come to expect from our fancy > monitors. > > Changing the resolution doesn't zap it into line. Nor do the reset buttons > on the front have any effect on this condition. I've looked over it's > Apple Service Manual, but there's nothing immediately relevant there. > Someone had a similar problem with a different brand screen, and says > replacement of PQR capacitor on XYZ board fixes it. Not quite what I was > hoping for! > > Earlier today I disassembled the unit to hunt for obvious flaws. Not so > much as a cracked solder pad! I resoldered the ones on the CRT board > anyhow, and it's behaving better now though there are hints that the > problem remains. > > Any ideas? > > Thanks, > Jesse This is a common problem with the Multiple Scan 17. It is due to dry joints (cold solder in USA) on 3 390 ohm surface mount resistors on the video board. If you removed the metal cover on the back of the video board to resolder, you would have missed these, as they are on the other side of the PCB. It is a double sided board. Remove the board from the metal can, then look between the video IC LM2205N and the video power IC VPS07S heat sink on the component side of the PCB. The 390 ohm resistors will have '390' marked on their body and will be the largest on the board. You may have to remove some adjacent electrolytic capacitors to get good access with a soldering iron. Steve Bell -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
