8" TFT for MFD Input Problems

[Nemax]

Hey

I bought one 8" TFT with control board on ebay a couple of weeks ago and got it today.

So i fired it up using a hdmi and 12v power adapter. The screen lights up saying "no signal".

But its stuck on VGA. It comes with a small "button board" and I cant seem to get the input button to do anything. Its shuts off after 10 seconds because of no signal. Sadly i dont have a

VGA cable so I cant get the damn thing to stay on.

 

Ebay link: http://www.ebay.com/itm/181395634298?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

As you can see on the picture bellow;

Buttons;

1 - Power

2 - Menu

3 - UP

4 - DOWN

5 - Input

 

But my board seem to be:

1 - Power

2 - Power

3 - Power

4 - NOTHING

5 - NOTHING

 

Could it be defective or do you have to use VGA first time.

Anyone here have any experience with these boards/Screens?

 

 

[BravoYankee4]

Have you tried any other resolution/format on the HDMI signal?

The current signal might be out of range for this controller...

[AstroEma]

Hi there,

 

I have the same board and I did not have this problem. I actually turned it on the first time without VGA or HDMI cables connected and I could switch inputs.

 

Hope this helps.

E.

[Nemax]

Have you tried any other resolution/format on the HDMI signal?

The current signal might be out of range for this controller...

 

I tried 800x640 , 1024x768 & 1080p

 

 

 

Hi there,

 

I have the same board and I did not have this problem. I actually turned it on the first time without VGA or HDMI cables connected and I could switch inputs.

 

Hope this helps.

E.

 

What power supply do you use AstroEma? I think my 12V / 1.5 Amps might be too strong for the board.

[EAKMotorsports]

u need to change the input mode. because u at vga mod so if any input is plugged in that (vga) will shut auto.

[AstroEma]

I am using a 12V 2A power supply without any problems.

[BravoYankee4]

I tried 800x640 , 1024x768 & 1080p

 

 

 

 

 

What power supply do you use AstroEma? I think my 12V / 1.5 Amps might be too strong for the board.

There is no such thing as a too strong PSU.

If the consumer board needs a certain wattage it will only "pull" that amount from the power supply.

So having something that is rated 1A can be supplied with a PSU rated 100A without any problem.

If the PSU is rated 0.5A you will have a problem.

 

Normally you need to have the correct voltage though.

[yipster]

I have a similar setup as yours but mine worked on HDMI the first time.

 

Have you checked that you are actually outputting to the screen?

Go to screen setup in windows and make sure your screen is detected by your graphics card and you are extending your desktop to this screen.

 

Edit: I used a 1.5A 12Vdc adapter, it works fine.

Edited March 10, 2016 by yipster

[Nemax]

I made a video showing the problem.

 

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[yipster]

I made a video showing the problem.

 

Right click on your desktop and select 'display settings'.

 

Can you take a screenshot/photo of the display setting?

[Duckling]

I got two like that for my mfcd's working with either vga,video signal or hdmi

Spec state up to 1080p (i can run my down to 800x640 with no problem. Best guess is a bad main board or the video control subboard may be wacko. As said above check your used port for possible errs in settings/refreshrates etc. Youe tried another source just in case ? Pc, port on your card or say a plain video out from a cam, to eliminate

If not made already check if you can get hold of a vga cabling and adapter, might be good for future projects also.

- verify the used gpu port (or motherboard port) is ok by connecting other monitor/tv using same adapters used for that monitor. If nothing remains and still inop, ask seller for replacement boards or a discount on an extra set to verify

 

Best

/gus