Question about Compaq Presario 2140US Notebook

1 Answer

Breakdown LCD CPU

I dont remember the model but the brand is EPSON.
Im sorry but i posted my inquiry on the wrong page.
Im having trouble with our LCD projectors, always breakdown no input signal, abnormal user operation and sometimes shuts down itself.

the provider has insisted our desktop PC is causing the breakdown which we doubted. If we dont see any bad video projected, seems normal then suddenly breakdowns i dont think it should be the PC> However we have used cabling made by us only. There is a posibility that our tech support has only wired the RGB Hor-Vert signals but failed to complete the groundings. There are instances that the video shifts to one side of the screen or sometimes jitters horizontally but occasional otherwise the view is almost as normal. after a few months ony of using, the LCD started to go eratic, shuts down and unable to start unless unplugged and restarted. In its worst condition, the LCD system will say no signal though it is hooked to the PC.

Main question only is that if such an abnormality will be caused by the desktop PC, HP Invent model using Nvidia FX5500 dual display, L:CD is hooked up to the DVI-converted to VGA output. Monitor frequency is set to 60Hzs only, resolution at 1024x768.

Or, can lack of grounding will cause the breakdown though POCD systems performs normal in its initial stage. from time to time losses horizontal stability.

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  • Anonymous Mar 18, 2008

    can anybody give their opinion?

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  • Compaq Master
  • 5,317 Answers

Wow a compaq forum , HP is correct forum nobody reads this.???
post to HP folks , i just stumbled on this.


wow are you a 1 PC shop,. cant try other PS with that PROJECTOR
Desktop or laptop.
gee? so simple a test, or move PC to projector direct, omg works.
and custom cabling,?????????oops RED FLAG
that is what is wrong,
ever read the VESA spec, on this, its tricky (2002 worst year ever)

if you connect that pc direct and it works well gee the cabling is wrong!
no distances stated, 10ft, 100ft 1001ft, what?

btw ive built these systems my self, even from scratch, (chips)
later, late 90s on.
they also sell pro grade, buffered VGA, controllers.
even from 1 PC and 5 projectors,
there are buffers inside that make the signals perfect at all times.

NO DISTANCE STATED!
do be aware you can not run COAX that far in most cases.
facts. (ig goes blurry, sync weak or goes to sleep mode)
only buffers work. (video band widths are wide and high)
One other system sold is a converter
that converts VGA or DVI to a custom data stream at the PC then decodes that at the other end for perfect signal. THERE.

one famous company that I bought from was
BLACKBOX.(tm)
talk to them been using them since day1, before went public stock.

https://www.blackbox.com/en-us/products/black-box-brand-products/video-multimedia

Posted on Jun 27, 2017

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SOURCE: cannot conect presario V4000 to projector

Set your screen-resolution to 800-by-600 at 60 Hz.
Then, use Fn-F4, to see if the projector accepts 800-by-600 input.

Posted on Apr 10, 2010

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