Thanks for help. I tried both of your suggestions.
I found the 10 amp fuse blown connecting F1506 & F1507. Top fuse located slighly above where 110 power enters unit.
After replacing fuse I turned on unit.
1.The Power button flashed green and the display finally lit. Display showed AV Surround Receiver and the changed to Tuner Stereo, During this time three small boxes were also present on display indicating SW, FL and FR. The unit then turned itself off and the Power button went to flashing red.
2.Tried pressing Power button and # 33 and 34 buttons at same time, nothing happened.
3.Tried pressing #33 and 34 together and holding; then pressing #3 button and also holding. The display almost completely lit up with with flashing info and the three green small lights on bottom right also flashed.. I held these buttons for perhaps 10 seconds and then heard a snap (very slight smell) and unit turned off.
None of the fuses in the unit were blown.
I did these three steps several times with the same result and still no blown fuses.
Any ideas where problem lies.