How can I check my TV (or external monitor) input latency?

[sofakng]

This isn't exactly related to Blur Busters (i.e. 120 Hz) but hopefully somebody here could help me anyways...

I'm trying to test some TVs and monitors (and A/V equipment) for input/display latency but I don't have a CRT or high-speed camera (just a DSLR).

Can I use my laptop to perform the test?

I've actually tried this already: MacBook connected via HDMI to a TV (and also an external monitor), then I ran a frame counter on the cloned displays while taking a picture at 1/320th of second.

The result was that the TV showed a LOWER counter than the MacBook (seeming to indicate that the internal MacBook LCD had more lag than the external display).

Anyways, does anybody have a better method of testing without using a CRT or high-speed camera?

[spacediver]

have you seen this thread?

http://forums.blurbusters.com/viewtopic.php?f=10&t=1162

[sofakng]

Yeah, but that requires a CRT ...

[flood]

well my method is for measuring input lag differences, so you could also use an LCD.
but it's really not that expensive to get a crt.. you don't need a fancy one.

well one issue is that most crt's can't display widescreen lcd's native resolution, so the lcd scaler comes into play.