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follow the power cord to where it plugs into the small AC filter board on the right side looking in the rear. Check the fuses on that board there is one but some versions of the ITC222 chassis has two fuses on that board.
Your RCA TV needs serious troubleshooting. Burning smell is from HV transformer or resistors smoking.
Most likely power supply and/or high voltage circuit or convergence circuit. Many times RCA have multiple or secondary faults that occur with HV or convergence failure.
Repair of RCA HV or convergence usually requires exact manufacturer parts and upgrades or repair in power supply. I would not advise trying this repair without manufacturer support for correct part numbers and service bulletins.
OK on same circuit board as fuse up on the front part of board look at capacitor cp150 if it is swollen or puffed up it is bad 2200uf 16v use 25v and replace 2 other capacitors in same area cp114 cp120 220uf 35v.
1. Check power supply fuse if the fuse is blow so are the caps do not try to replace the fuse you will smoke this thing.
2. upon inspection you can remove the power supply unit and buy a new one. There about $150 bucks aftermarket for this unit. So I would be looking for other RCA's with this same series and pull some psu's to save money.
I hope this helps you find a solution for your TV these are nice to have and worth the repair.