Thread: VGA output hardware testing device

Continuing from a previous thread: Sceadwian, i am just looking for a normal screen output. That is a "suspect VGA card" in a test PC. PC is booted and i look for an output (at the moment i look at a connected LCD monitor). But its not the best option, to carry a monitor everywhere as if my monitor were a briefcase - LOL !

So these H and V sync pulses - do they carry positive DC volts ??? If that be the case, does that not come close to the answer ? Have a look at my crude ansi diagram below:

R++++++++++++++++++++++
G+++++++++++++++ LED3
B++++++++++ LED2 -
LED1 - -
Ground(-)--------------------
LED4 -
H++++++++++++ LED5
V+++++++++++++++++++++

If all LEDs light up, the VGA output should be okay ?

For other persons reading - i am trying to create a simple VGA output test device that hooks up to a VGA adapter port (Omit VGA monitor). It just looks for live signals necessary for a normal VGA operation. So far Sceadwian has been kind to offer some advice.

Sorry, my ansi diagram got messed up after i submitted it.
It is only depicting that all 5 lines - R,G,B,H,V are run through LEDs and connect to a common ground. So if all LEDs light then VGA signal should
(in theory) be good, i assume.

BTW, i am NOT a electronics person, I only understand basic, elementary
stuff in that area.

Thanks, for any additional input.

Thanks SW:

I am beginning to see where this would not work. As i had mentioned before,
about the "carry-over" of damage, i have seen it happen to other techs and
even myself -with something as simple as a keyboard, damaging a motherboards, etc. So i just wanted to point out my reason for an isolated test VGA tool. LCD monitors are too expensive for me to carry everywhere
and test other peoples' damaged PC. CRTs are even worse, they are too heavy.

I guess i'll work out something.

Thanks again.