Troubleshooting My Heathkit H19 Terminal: Seeking Guidance

I am reaching out to the community for assistance with my Heathkit H19 terminal. Upon receiving the unit, it did not boot successfully, prompting me to take action. I meticulously recapped the boards and replaced several cracked resistors, hoping these repairs would restore functionality.

Despite my efforts, the terminal continues to exhibit issues. Currently, it produces intermittent beeping sounds from the speaker accompanied by a persistent whine from the flyback transformer.

I’m looking for insights or suggestions on what might be causing these problems. If anyone has experience with the Heathkit H19 or similar devices, your expertise would be greatly appreciated!