On Apr 3, 2018, at 3:48 PM, Phil Blundell via cctalk <cctalk@classiccmp.org> wrote:
> On Tue, 2018-04-03 at 21:07 +0100, Ian Frost via cctalk wrote: >> >> Recently booted up my B&W Powermac G3, all came up fine including the >> 17” CRT monitor. However after a second or so, the >> monitor gives a ‘popping’ sound and the image on the screen expands >> then shrinks. This repeats every few seconds. >> >> I’m guessing the monitor is on the way out - but as this is a >> complete B&W system - I wondered what the likely cause is? > That sounds like some sort of problem with the EHT supply. https://en.wikipedia.org/wiki/Apple_displays indicates: ….The Apple Studio Display series of CRT displays were available in a 17" Diamondtron and a 21" Trinitron CRT, both driven by an LG-Manufactured chassis. These displays were notorious for faulty flybacks. … </instant wikipedia expert >[ Would that be consistent with the symptoms, and is there a good way to test? - Mark
