IP Camera 3 and 4 no image

[Emergpa1]

Hi. I connected two additional IP67 8mp cameras today to my Amcrest DVR but there is no image in live view. I checked my connections, power supply connections. I did have to add 150 foot extensions to the supplied 60 foot cable. I used WildHD All-in-One Siamese BNC Video and Power Security Camera Cable BNC Extension Wire Cord with Female Connectors. But the new camera images are not seen on the CCTV monitor. I had initially set up with only two of the four cameras. The first two show up fine. Now a few days later I have added the second two IP cameras, but no image. Is there something I need to do to make the live view recognize the new cameras? Is it a problem with adding the extension?
Thanks.

[Revo2Maxx]

Hello and welcome to the Forum.

SO please forgive me for not understanding the issue.

1 DVR you have?
2 Cameras you have and on what cable?
3 have you tired to take a PSU closer to the cameras your trying to make come online that you added the LONGER wire?
4 Kind of answers from 1 but how many PORTS aka channels is your DVR?
5 did you update your Firmware on the DVR?
6 did you install your IP cameras outside of the DVR and give them a Static IP?
7 Did you install the FW updates if needed for your IP cameras?
8 wait I will just wait for other answers before I keep asking. Sorry I can't see your settings setup or system so hard to know what you have done, or should do.