On Mon, 4 Jun 2018, Neil Cherry wrote:
On 06/04/2018 01:59 PM, jakari via vcf-midatlantic wrote:
On 2018-06-04 09:44, Ethan O'Toole via vcf-midatlantic wrote:
I'd start by looking at the inverter board. From pictures online, it looks like that laptop uses an blue electroluminescent sheet for the backlight, not a ccfl like more modern laptops. -J
EL backlighting has a fairly short halflife I believe.
Maybe it's possible to get a new sheet of it.
http: //glowhut.com/el-panel/ implies "yes." It hadn't occurred to me that http: laptop screens could be EL-lit, I've only see it on small alphanumeric LCDs.
Still requires a functioning inverter, which I'd guess is the real problem here. Bad caps, probably.
I forgot to mention that page, and Adafruit.com show some seperate inverters. You may be able to cram in a whole new unit along with a new EL sheet.
(Keenly aware of this after my Thinkpad 600E's backlight inverter gave it up two days before VCF East!)
I've got one of those (TP) also boots fine the first time, shows for a minute and then poof gone. No screen (unless you shine a very bright light on it). Dead backlight. That's a project for another day.
Yeah, that's what I said, and I so just hauled an external monitor. Which honestly made a more usable exhibit. I'll tear into it soon and see about fixing it. At first I thought the brightness pot was flaky, but it's pretty clearly the inverter. Mayyyybe the tube but I doubt it. What I really want to fix is the orange plasma display on my PS/2 P70. Some posts on the VCF forums are encouraging in that regard... -- Jameel Akari