[vcf-midatlantic] Ideas on replacing a backlighting on a laptop
jakari at bithose.com
Mon Jun 4 14:56:03 EDT 2018
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
>> (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...
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