Keys Not Working After Replacing Switches

[suhendrowan]

I have a problem with my keyboard after replacing switches. Its a soldered-type PCB. After finishing soldering the new switches, key 1, Q, A, Windows not working, it think they are on the same column. Last time I check all keys are working after I desolder all switches. it Is it still possible to fix this problem?

I dont know about electronics and I have no idea how to fix it. I love the keyboard so much. The keyboard is Hyperx Alloy FPS Pro (TKL). I attach picture of back PCB board for the experts here to examine and direct me how to solve it. Thanks.

[Maledicted]

I'm no expert on keyboard matrices but the solder joints on your 1 key look cold. Have you tried just reflowing those with some flux and/or a bit of decent 60/40 solder? If the pad on the right leg is lifted you might need to try to figure out where that column leads, or carefully scrape off the solder mask and solder a jumper wire directly to the trace nearby for the 1 and Q keys.

Have you got a continuity tester or multimeter to try to test for continuity along those right legs where it looks like that circuit runs?