Hi all

So I have this problem with my rear brakes (rim brakes). The right brake arm doesn't move much but just stays close to the wheel rim but not touching. So when I pull the brake lever the right arm travels a very tiny distance -compared to the left arm- before touching the rim. First thing I did was to try adjusting the tension screw on the right side and also on the left side but that hardly made a difference, if any. The damn right arm just doesn't move much and it stays close to the rim.
When I take the noodle out of its holder (to release the brake cable) and move the arm (with my fingers) towards the rim there's almost no resistance at all. So, I'm wondering if it's the spring (the wire thingy that provides the resistance).
I've spent a lot of time trying to figure out the problem buy I couldn't. The left side arm works a lot better. So, are there any options other than buying new brakes? The ones I have on now are Promax. I was looking at the Shimano or maybe Tektro brakes. Are these universal ? I have the 700C wheels. The brake system is the V brk or linear pull.

Thank you.