I have a circuit board that I need to repair if possible. It runs off 24 volts a/c. I noticed a 5.2 ohm resister ( green red gold) was burnt immediately after the 24 volt power coming in. I replaced the resister and it immediately got very hot and started to burn. Next part in line after the resister is a voltage regulator 7824. The area on the board around the regulator and resister has all overheated. I am wondering if a bad regulator can cause my resister to burn up. I would appreciate any help before I order the regulator for it. Its a $1500.00 board so thats why I am willing to try. Any other trouble shooting tips would be apreciated too. I have included a picture if it helps. You can see the upper left hand corner where the 24 volt wires come in and then the resister to the right and then a diode to the right and then the 7824.