If the monitor takes "time to warm up" or clicks, replace these first.
To ensure the 5V stays 5V, the board uses an (usually a PC817) and a TL431 voltage reference. wannien 101v0 power supply schematic exclusive
It "tells" the primary PWM controller to work harder or slow down based on the output load. 🔍 Troubleshooting the Wannien 101V0 If the monitor takes "time to warm up"