How Do You Solve Computer Monitor Display Problems That Caused By A Defective Screen Grid Voltage (G2)?
Computer Monitor display problems such as no display with high voltage symptom can be caused by many reasons. A defective picture tube, a faulty video preamplifier IC, a missing heater voltage, torn signal cable, negative G1 voltage became too high (-120 volt and above), CRT board problems, a missing or low G2 voltage and etc could cause no display but with the present of high voltage. In this article I’m going to show you how to tackle a missing or low G2 voltage problem. First, you must confirm if there is high voltage present at the monitor. You can use a high voltage probe to measure the anode voltage (24 KV) or you can try to listen to the high voltage sound produced (if you are experienced enough) once the monitor is switch on If the high voltage is present then your focus should be in the screen grid voltage (G2) circuit. If there is no high voltage, then I will explain it in another article. How to confirm if G2 voltage present at the pin of the CRT board? By placing your posit
