I have compared with the other DSP5200 I have, and they are not so hot on the back. Have disconnected all contacts and the beeping sound is still there, it is there when you play too, the peeping sound is drowned out by the music.

TV room: 861v8, UHD722,Front 2xDSP7200SE, DSP7200HCSE, Side DSP5200, Rear DSP33, DSW, Velodyne DD 15 Sub,
Roon Rock NUC, QNAP NAS, Chromecast Ultra, Apple TV, Cambridge Audio 752BD, Pro-ject Pre box S2 digital, Philips Pronto remotes, Supra LoRad Power.
Office: 800v3, MS200, DSP3100
Basement: MS600, 502, 557, Dynaudio 52se, Dynaudio Sub 250