[Elecraft] KX 3 Intermittent problem power up problem

[l s via Elecraft]

Has anyone with a KX3 experienced this problem? When turning the kx3 on with theband- and atu tune buttons the back ground leds come on but no screen display. Removing the power cable and letting it sit there disconnected for a few hours and then when power up is turned on   everything starts working just fine. This occurs intermittently several times a day.
Have performed the parameter initialization as per the instructions on page 46 of the manual and upgraded to the latest firmware version but no help.. the problem still exists. Any suggestions short of sending it back to Elecraft. S/N 6652. Tnx for reading it.Lou KI6UM