first, I would not buy a "kit"; prices on these range from 40 to 80 dollars and most of the parts are not going to be needed.
See attached photo of convergence board in a set like yours.
You can look at the two chips in your set: either they are STK-392-110 OR -150--BOTH ARE THE SAME BUT THE 150 LASTS LONGER.
A FEW VERSIONS WILL USE STK-392-120---IT IS NOT INTERCHANGEABLE WITH THE 110 OR 150 CHIP.
In either case you can buy on EBAY (A seller I use) a pair of the chips for about 12 dollars.
About the only other thing that goes bad is there may be damaged resistors around one of the chips--usually just one but they are easy to spot and or test (see photos)
No matter how you add it up you can buy the parts you need for under 25 dollars including shipping.
If the photos and information I have provided helped you, rate this solution as very helpful as I do this here for free.