Burnt out bulb(s)
My high-end Panasonic in-dash CD/FM/MP3 job went black after a spate of
rough-road driving. A flashlight revealed that the birefringent display was
working, only not showing up.
Instead of what you'd guess (leds), the jerks used incandescent
grain-of-wheat bulbs to illuminate the display.
BTDT... Radio that came in my Mazda. Rough roads one night, and the
display went black most of the time, but would flicker to life every now
and then. For a while, I could get it to light up with a properly placed
"THUMP" on the dashoard, but even that stopped working. Like Lloyd,
putting a flashlight to it at the right angle would show me that the
display was working fine, but no light was coming through. I tore it
down and found that the lightbulb behind the display had died. Replacing
the bulb with a red LED/resistor made it work just fine (and even nicer
for night driving than the glaring yelow-white bulb it replaced)
(The folks who put it together *OBVIOUSLY* intended it to be a "throw it
away and buy a new one" item... I had to unsolder/resolder *41* pins
connected to the LCD module to get to the bulb behind it. Fortunately, I
had nothing better to do that day, so it was a bit of time spent, and
Don Bruder - firstname.lastname@example.org - If your "From:" address isn't on my whitelist,
or the subject of the message doesn't contain the exact text "PopperAndShadow"
No, I tried that. The dash lights brighten and dim but not the clock.
Once I took apart my wife's little battery powered digital alarm clock
apart(I don't know why now, it seems kinda dumb)and put something back
together backwards. Instead of black on gray it's now gray on black and
hard to read. I was going to fix it but she wouldn't let me ouch it
again. I haven't been messing with the car clock though. :)
Yup! Remember, I didn't say "fluorescent" or "neon", or even "LED"
display.... I said birefringent.
That's a type of display element that merely twists light's polarization.
It makes for a very low-energy, high-contrast display better suitable for
backlighting that ordinary field-effect LCDs.
That and I had a cervical disc removed and fused about a year ago. It
was compressing my spinal cord to about half the normal diameter. My
hands and fingers still aren't quite right, probably won't be after this
much time has elapsed. :(
Like Art Linkletter once said, "Old age isn't for sissies."
Sorry to hear about your problems with your hands. I have nerve
damage in my left arm and hand, along with Carpal Tunnel Syndrome in my
right hand. This turns 15 minute projects into all day jobs. Recently I
spent three days replacing the muffler on my 87 Ford Ranger. When I was
20 it would have taken an hour, tops. I had to cut the damaged ends of
the old muffler off, but I couldn't see what I was working on. Its no
fun cutting one thin pipe off another, without burning a hole in te
second pipe when you can see what you're doing.
Service to my country? Been there, Done that, and I've got my DD214 to
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.