20 Most Recent Sony FD Trinitron WEGA KV-30HS420 30" TV Questions & Answers

Check your board on power supply if you can find broken tracks.I might cause the problem

Check and replace its main system control memory IC. It is not working properly. Check and replace damaged component/s at it main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts. Do a search by type in the brand name of your device at its search box. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis.

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power led, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating, to many popular brand TVs and other devices. Viewing it in "Mosaic" will make surf easy. http://electronicshelponline.blogspot.com/ Blinking codes details to many popular brand TVs are given. Gopakumar Gopalan Google

Just reset the TV to its factory settings and check. To do this you have to enter its service mode option. How to enter the service mode option is described in one among the posts at the site linked here. But, before doing this reset, just connect the HDMI cable to the TV, and input an HDMI signal to it. If there is no input signal, the set will display as 'no input'. Check this first. If you wish to get further assistance from me, come over by FiXya comment. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. http://electronicshelponline.blogspot.com/

Main board fault. IIC Bus line has a short. Continious blinks of standby light denotes this. These are called blinking codes.If you wish to get more details, surf the following link. There are over two thousand and four hundred posts. All are related to television and other domestic electronic equipment service help. You can get a solution there. More than Nine Lakh viewers cannot be wrong. http://electronicshelponline.blogspot.com/

Blinking of standby light are fault indications. How many times the standby light blinks at a time. Count it, and inform me.

Cable direct to coax fitting on rear of set, in menu set to CATV/cable, and auto program---any channels it misses or you do not want you can in same menu manually add or delete one at a time with the sets remote.

Visit this site for details. All information about this type of fault [2 blinks of standby light to sony Trinitron]; are described here in detail."Electro-help", is the name of the site.Search for it on Google.

Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672

Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505

Sony KV-30HS420 TV shuts off, indicator light blinks 7 times

There is a power supply fault causing the EHT to rise above 33KV.

High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.
Hope that points the engineer in the right direction.