Make sure you are using the correct antenna connector, front or rear.? Will have "R" on display if rear.
The connector can be selected in menu for different bands.
There is only one PA for all the bands so if working on one band should be on all.
Be careful with the PA.? The rig has little to no protection so if using the wrong connector or bad load it can damage the PA if in TX for long period.
One other note, what mode you using for your test???