Solution for pcbs not syncing with LCD?

[bytestorm]

Hey

Recently got a nice little 4:3 LCD for my test bench to stop punishing my CRT with powercycling during all repairs..
But some (quite many) of the pcbs I have have some sync problems when connected to this lcd :/.. every second the image rolls vertically and the screen looses signal, and then I get a nice picture again, for 1 sec, and it repeats

what do I need to make this stop? preferably something cheap since this is only for testing repaired games / during trouble shooting.

Thanks in advance!

 

[jassin000]

Arcade PCBs output a wide range of sync timings.
Most LCDs only want 60.0hz with some minor tolerance (say 59.0hz-60.1hz).

A device like a DVDO can buffer something like 54.88hz out to an even 60.0hz.

However this comes at the cost of at minimum 2 frames (16ms) of lag.
They also are hard to find today and not cheap when you do.

I would recommend a freesync/gaming LCD like a BenQ that supports all sorts of different/wacky timings.
Naturally an OSSC is also required to line double 240p into 1080p.

None of this shit is cheap bro

 

[bytestorm]

Arcade PCBs output a wide range of sync timings.
Most LCDs only want 60.0hz with some minor tolerance (say 59.0hz-60.1hz).

A device like a DVDO can buffer something like 54hz out to an even 60.0hz.
However this comes at the cost of at minimum 2 frames (16ms) of lag.
They also are hard to find today and not cheap when you do.

I would recommend a freesync/gaming LCD like a BenQ that supports all sorts of different/wacky timings.
Naturally an OSSC is also required to line double 240p into 1080p.

None of this shit is cheap bro

hmm I dont mind the lag since its just for my workbench, but for the same reason Id like it cheap
I was hoping there was some cheap china pcb availible or something..

 

[bytestorm]

Nice setup btw . Didnt see the pics first time i answered (they didnt load?)