I-Appliance BBS
The Official Source for Internet Appliance Upgrades and Mods
Amazon Honor System Click Here to Pay Learn More
BBS Main List | Sign In | Sign Up | Search | Help | Linux-Hacker.netReply to Thread | Printer |

Home / I-Opener Areas / I-Opener Technical Stuff
Just wondering...

New MessageJust wondering... (modified 0 times) deornoth
Profile | Email
I was just wondering if it is normal for the I-Opener's LCD to have horizontal 'distortions' on it. They aren't really a bother, and don't get in the way, but I was hoping everything is alright. They look to be caused by some type of interference, maybe with the Lasagna fan over the CPU, but I'm not sure. It kinda looks like little ripples in a pool of water (reminds me of when I got some unshielded speakers too close to an old 14" monitor a few years back).

I'm new here, but I've read for a ways (20+ pages) into the earlier posts here and didn't find anything regarding this.

If this is normal, no problem, but if not, I was hoping to perhaps find some way to cut it out entirely, or perhaps lessen the effect (having your screen wibble-wobble in the middle of the night isn't the most relaxing of sites).

Apparently I've got the V1 I-opener, a Rise mP6 266 @ 200MHz w/ Lasagna cooling fan, 128MB RAM, an IBM 1.4GB laptop drive mounted inside the cover, and enough RF shield off to prevent the Lasagna from buzzing and to provide an area to mount the hard drive to the plastic case.

Other than this, I'm quite happy with my I-Opener, RH 6.2 working fine with kernel 2.4.2, I found a reference to 'hdb=noprobe' wich fixed the only actual problem that I've had.

Thanks in advance for any help you guys can offer!

03-26-2001 17:12:01

New MessageRE:Just wondering... (modified 0 times) starfish
Profile
You don't say if this is a Moving pattern or not.
AnyHow, If it is Not Moving, I wonder if Your LCD is Twisited somehow in closing your I-Opener back Up.
Next Time You have it Open, Try Powering it up & take a Look @ it. Does it Look the Same ?
While the I-Opener snaps apart & back together,
Nothing should be Stressed or pinched or Stuffed when You are Done.
GENTLY & LIGHTLY Pressing on the inside edge of the White Frame will show the effect I am thinking of.
03-26-2001 20:41:57

New MessageRE:Just wondering... (modified 0 times) deornoth
Profile | Email
The pattern is like small waves in the liquid crystal, moving from top to bottom in the display in long parallel lines from one side to the other horizontally accross the screen. The effect is very light, and I only noticed it when all other lights were off and I was staring into the screen working on a kernel build. It could possibly be interference from an AC power cord... but I'm not sure at the moment.

It's not a problem for my activities, I'm just a bit concerned about the potential longevity of the LCD.

I'll check for stresses caused by the case the next time I have it open, thanks for the tip.

03-27-2001 00:05:57

New MessageRE:Just wondering... (modified 0 times) D2tw4all
Profile
LCD's aren't generally affected by outside interference, at least not like normal CRT's. It may be normal, the screen is quite low quality and what you describe could be an inherent flaw in the cheap screen. My screen is far from perfect, and if it is as light as you suggest I would think that it's just the way the screen is. By all means I would make sure the screen isn't under any stress, if not to remove the lines at least to make sure you aren't doing damage by leaving it that way over the long term. In any event, good luck...
D2.
03-27-2001 19:57:38

New MessageRE:Just wondering... (modified 0 times) 02U2
Profile
I have several i-O's and have noticed the same effect on one of them. It's not real bad and just noticed it too in low light. I think it's normal with these cheaper screens.
Actually it may partially be caused by the flourescent back light tube.
Have you ever noticed on some flourescent ceiling area lights some of the older tubes kinda have a rippling effect....
There may also be a slight optical interferance? between the scan rate of the lcd and the oscillating frequency of the high voltage power supply to the tube causing the tube to act kinda like a weak strobe? combine that with the right scan freq or harmonic of it on the lcd and that may cause the ripple effect...
Just a theory...
03-27-2001 20:31:18

New MessageRE:Just wondering... (modified 0 times) deornoth
Profile | Email
"between the scan rate of the lcd and the oscillating frequency of the high voltage power supply to the tube causing the tube to act kinda like a weak strobe? combine that with the right scan freq or harmonic of it on the lcd and that may cause the ripple effect..."

Sounds along the lines of what I was thinking... It's a bit reassuring to know that I'm not the only one seeing this. I'll keep poking around and see what I can see...

03-28-2001 00:22:46

New MessageRE:Just wondering... (modified 0 times) Spike
Profile
My screen is rock steady, but I was thinking along the lines of O2U2. Some flourescent tubes just naturally throb, and it is usually caused by the AC current that powers them. Don't know what would cause it in the DC powered I-Opener, but that's where I'd start checking.
03-28-2001 08:37:53

Reply to Thread | Printer |
All times are PSTPowered by UltraBoard v1.62



Copyright © 2000, Netmake Inc. All Rights Reserved.
See Terms and Conditions for more information.




i-opener opener laptop notebook computer help drivers dll free windows dos repair fix linux mac macintosh 2000 95 98 nt pc configure hardware software sound video netscape explorer network networking lan wan software cmos fat bios printer card mouse modem ide scsi cd rom controllers scanner tape hard drive cgi scripts source code mp3