Need Help adding TV (the code you added last time didn't work)

Hello. Thank you for adding this device. I tried it just now and my TV cannot be controlled by this code. 1. I have tested my U1 with my Sony TV and it worked well after I added the IR code to the U1 remote. 2. The following Android app successfully controlled my Polaroid TV (model: FLM-3701) with the use of my IR enabled Xiaomi Redmi Note 4: "Universal TV Remote Control" by "CodeMatics Media Solutions" --> using their code set for "Polaroid FLM-3701" Something didn't work right, and I couldn't control this TV with my U1 remote. Could you help me on this please? Maybe by checking the code for this TV model or by looking at the code used by this app? (e.g. download the app and figure out the code set by using an IR to IR decoder?)(I don't have the remote for this TV anymore, thus I can't use this method) Thank you.