Ok radio powers on I hear receive good as I have tested in other radio I have, tx power works but no modulation at all on all bandsYou say no modulation.
Do you hear any receive? Hear any stations - did you try to see if you can talk to someone over the air on that radio - can you hear them - do you have squelch control - did you try PA controls - does the radio RX and TX lights switch in proper modes - Have you tried a different mike - is the mike wired properly - does the S/RF meter work - do you have SWR and Calibrate do they work - did you check for RF on an external RF meter - does the channel selector work - what type of equipment can you use to check the radio - did you try an external speaker - did you try the external speaker using the PA jack when you are in PA mode - do you hear any noise thru the external speaker - does the radio "light up" and you can see the radio has power and you can turn the channel knob - did you check the RF gain control to see or hear any changes in receive or noise level - do you know what you're doing?
Can you tell us more than just "No Modulation"