Graham. wrote:


I have dissected some recently. The Philips 11W ones were completely
dead, but the tubes themselves showed no discolouration at the ends,
so I took a look at the ballasts
The reservoir capacitors have gone high ESR, and are bulging
at the top.
http://myweb.tiscali.co.uk/infoweb/philips_cfl.jpg

That has happened to all the bulbs I've ever taken apart too. Except for one
where the PCB tracks burned out.