Thread: Help with first Car PC

Sounds like the a connection for the touchscreen is not secure.

How did you hook up the screen? You should use a regulated 12V source if you can. If you are hooking it up to unregulated 12V power, you should use the power filter that's included inline with the cigarette lighter adapter.

its connected to my M2-atx power supply so i didnt think i would need to use the filter. It only happens when on hot days tho. work fine in the morning or on a cold day. The PC is located in the boot. Would the length of the cables have anything to do with it? voltage drop?

I would suggest posting some information on the screen installation you have done, at a guess the display simply is over heating due to not getting enough cooling.
Have seen this issue with a few screens before when the vents are blocked or the screen itself is hard mounted against its rear casing.

If the issue occurs only due to temperature and not due to how long the vehicle/system has been running then i would be looking at possible causes for it over heating.

yah i was thinking it was most likely a overheating issue. Do you think it would be the screen overheating or the CarPC? any suggestion what i could do to cool either. I live in Canberra Australia and the summers get pretty hot.

About my CarPC:

Intel atom D525mw motherboard
M2-ATX power supply
Windows 7 ultimate
Lilliput EBY701-NP/C/T 7' ( came built into Double din case)

Have you actualy got a multimeter and tested the voltage at the Screen end and what gaudge cable are you using to run from front to back.

If you are going to control you screen via the rear supply if it where me I would be switching a relay and suppling the screen from a front power source.

most people do that to get the screen regulated power to prevent vehicle voltage fluctuations from messing up the expensive screen.. due to some of my led projects, i have found that there are tons of different ways to get regulated power, though, this forum in general more looks towards single-ended solutions-- ie. most prefer to install a psu that would power the screen and carpc then to consider multiple power supplies near the devices all over the car. and frankly, i don't blame them-- i've got at least 10 voltage regulators scattered through my car with plans to add a couple more..

if it was a voltage problem wouldnt it be more consistant?. its seems to be only when its a hot day

I checked the voltage at the touchscreen and it was sitting at 11.9v. Im thinking of putting a Fan in top cool the LCD board. Would it be better to have a fan that blew air onto the board or suck hot air away ?
cheers