7i52s replaced ic pin continuity question

hello,

i accidentally destroyed an ic and already have replaced it but when measuring continuity with my multimeter i saw that two pins have a connection (most likely on the board because i have ordered 2 ics and the other new one doesnt have a connection on these pins). There are 3 other same ics on the 7i52s and none of them has connection on these pins thats why im asking. Maybe there could be another component broken? Right now i dont want to connect the board to my 7i80 if i dont know if this is supposed to be or not.

i have uploaded a picture showing those pins.

That's correct, U15 pins 7,8,15 are grounded
8 is chip ground, 7 and 15 are unused inputs
4,12,16 are 5V

Okay thank you!

so i got my little oscilloscope and measured TX0A and TX0B and it seems like i cannot get a step signal from COM0, COM1 and COM3. COM2, COM4 and COM5 have Step and Dir signals. I will try to resolder every pin of this ic, maybe one doesnt have enough contact or contact at all.

i have a different idea. It would be ideal to have schematics or even pcb files to see which pin i can measure continuity on the 7i52s (for example from U15 pin 1 to some pin on the 7i52s) but i dont think thats possible.

Do you have the enable signal for TX0 set low? (pin 47 on the 50 pin connector) If not, the outputs will float.