Hi Roland,

It sounds like communication to the board is timing out, meaning it is unsuccessful. All of our units are functionally tested before they ship, you can pick one up online at matrixorbital.com , or check out the distributor link near the top of the page to find a local source.

Thanks ...

Hi Reo,

Unfortunately, by powering the unit incorrectly, it is difficult to say what else may have been damaged, but we can try a few things to narrow down the problem.

I understand the screen is not illuminating; it can draw a lot of power on start up which you may want to look into later, but ...

Hi Reo,

I see you've done quite a number on that board. The large burnt component you have circled is a 100uF tantalum capacitor, with the white negative polarity mark at the top, the one to the right is a 10uF tantalum, it too may be burnt. You may also want to check on R52 and R53 at the bottom ...

No worries Reo,

Sorry to hear you let a little smoke out of the board; we've tried to protect the unit as much as possible so hopefully you'll have only resistors to change. If you have any questions identifying parts on the unit or the pinouts, please don't hesitate to ask.

Thanks,
Troy

thank ...

No worries Reo,

Sorry to hear you let a little smoke out of the board; we've tried to protect the unit as much as possible so hopefully you'll have only resistors to change. If you have any questions identifying parts on the unit or the pinouts, please don't hesitate to ask.

Thanks,
Troy

thank ...

Hi Reo,

The purpose of the alternate power connector is just that; to provide power only to the display. Please consult the manual for your specific display to determine the pinout of that connector, I believe you may find you'll connect 5V and Gnd to pins 4 and 3 respectively.

LK204-25 manuals ...

can my LVK be powered up, by simply feeding the 5V and the Gnd to the alternative power connector 1 and 4 pin respectively ?, for testing purpose to see if it's fried or not .
regards
reo