> -----Original Message----- > From: Duo/2400 List > [mailto:[EMAIL PROTECTED]]On Behalf > Of Jackie Lund > Sent: Monday, December 16, 2002 8:54 PM > To: Duo/2400 List > Subject: [Duo2400] Re: Duo 280c Screen "Whiteout" > > > Other than the lamp and the inverter board, what other > parts would you > recommend switching, since neither of those replacements > had any effect? >
Check the supplies to the inverter board, there should be a constant voltage (12V?) and a second input that controls the brightness, this second voltage should change as you adjust the brightness, also there should be an inhibit line to turn the inverter off when the machine sleeps. This has just reminded me of a common but easily overlooked fault on many notebooks, CHECK THE LID SWITCH!!! (sorry for the cap's but it is easily overlooked), there is a switch that signals that the lid is shut, it switches the inverter off, if it is damaged or stuck then the inverter will never power on. Unfortunately I don't have any schematics, so I cannot tell you which line is which, the best thing is if you can borrow a working unit and compare the various lines to the inverter board. If there is no power to the board then check the motherboard, there is probably a fuse in the DC section for the inverter power, other than that I cannot offer any more help (unless you are in the UK then I could take a look at it for you.) Ben. ---------- Duo/2400 List, The friendliest place on the Net! A listserv for users and fans of Mac subportables. FAQ at <http://www.themacintoshguy.com/lists/DuoListFAQ.shtml> Be sure to visit Mac2400! <http://www.sineware.com/mac2400> To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> Need help from a real person? Try. <[EMAIL PROTECTED]> ---------- Dr. Bott | 10/100 Ethernet for your 2400 is finally here! MPC-100 | <http://www.drbott.com/prod/mpc100.html> RoadTools $30 PodiumPad available at Apple retail stores, $20 Traveler CoolPad at Staples. Both in white for iBooks at <http://roadtools.com> Midwest Mac Parts ][ <http://www.midwestmac.com> After-market parts for Macs. ][ 888-356-1104 ][ MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879! Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>
