Which capacitor to change on CR-10S S500 motherboard? I have a CR-10S 500 and want to change a capacitor on it to improve and solve temperature issues. This capacitor that needs to be changed should be labeled as "C4" as mentioned on this post but it's not present on my motherboard. The goal is to replace 100uF capacitor with 220uF 16V capacitor.

This is what the motherboard should look like:



but mine looks different. Below is what it looks like:



There is no version number on my motherboard and there is no "C4" capacitor. Also, the component that's labeled "330" on the original board is labeled "470" on my motherboard. It's hard to decide which capacitor to change. On my motherboard, there two capacitors instead of one, closer to the location of the capacitor that needs to be replaced. They are labeled "C42" and "C35" instead of "C4". I do not want to replace the wrong one since it's risky enough to replace just one capacitor on these boards.

Anyone know my motherboard type or version? Also, which capacitor to change?

EDIT:

Here is a better or zoomed in section of the place:



As Trish requested in the comment, below is also the back side of the motherboard.



theSealion might be right in his answer and I did a test and it all points to "C31" as he suggested but the problem is that the capacitor is different from the one it is supposed to be replaced with like on other CR-10 boards. I am not entirely sure if this is the capacitor since the type of capacitor are different from the one I was suggested to use.  Below is the new capacitor:



My current idea is to remove the tiny "C31", solver wire to pin 4 of LM2596 and to the new capacitor but I do not want to remove the "C31" because I don't want anything to go bad. 

Can I add the new capacitor parallel to the existing "C31" without removing the "C31"?
You are looking for a capacitor that must be connected to Pin 4 of the LM2596.

Maybe you could provide a better picture of that area so we could see the different tracks on the board.

The LM2596 is in the center of the right side of the board (it is also labeled  with LM2596D). The pins should be counted from top to bottom (in your picture)

My guess is, the Elko you are looking for is connected to C31, and you must look for the positive pin.



In this wiring diagram Cout is the capacitor you are looking for. The SMD Parts R1, R2 and CFF should be R31, R32 and C31 in your picture.

With the corresponging measurements I would say you do not need to replace the capacitors. 

In comparison to the old board your board already has the "fix" implemented.