Cluster lights goes off

[JDM240SXcoupe]

So i have a 92 coupe with a hud and digital cluster. So when i start driving it everything works all the lights on the cluster at night works, digital speed, and the hud. But after a while everything turns off. The hole cluster lights turn off,hud and my odo and trip stop rolling.Only things that work are the leds like for when i open the door,CEL,no seat belt, but everything else on my clusters goes off.If i hit the dash on top of the cluster everything comes back on, but then i hit a bump and everything goes off again.Has anyone fixed this kind of problem? Any experiences i have replaced the white square box that's by the fuses, but i dont think that's the problem. any suggestions, experiences, i want to know how fast im going and the cluster lights to light up.
Thanks

[Cgeigert]

How much has your car been screwed with? Has the dash and gauges been messed with before. Hopefully it's something simple like one of the 3 harnesses on back being loose. Pull it and see.

[JDM240SXcoupe]

Well previous owner did an auto to manual conversation. Doesn't have any aftermarket gauges. Im gonna pull it soon when I get my leds to install them on my cluster, thats when ill see what's going on. I saw somewhere some Guy re solder something on the back of the cluster, but can't find the link anymore. Any other tips, suggestions appreciated.

[JDM240SXcoupe]

Any one had this problem? solved?solutions?

[Cgeigert]

Did you check the 3 harnesses?