Sony trinitron KV-30HS420 HDMI

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/

this is a lamp issue please replace the lamp this always happen and best thing is you don't' need a technician to help you yo can do it by your own

Hi gg_fan_03

Between your laptop and the TV ,

• you may need a PC to TV Converter

like one of these:


http://sewelldirect.com/pc-to-tv.asp

instruction is on the web page.


• to enable on your laptop, set your Sony TV as secondary monitor.

• use the Video driver control panel.

the KV-30HS420 model is a CRT based set and thus has no "lamp". What is hte proble with the set?

Dan

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.

please check the vertical ic

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

AmigaDude posts how to reset the video to factory settings here: http://www.avsforum.com/avs-vb/showthread.php?t=766771

The instructions are as follows: 1 - Turn on TV and set input to port being used.
2 - Make sure PS3 is connected via correct cable.
3 - Power on PS3 via power button and HOLD IT for 5 seconds (release after the second beep). It should automatically configure your PS3 to the TV's native resolution for all settings.
Once reset, you'll connect your RCA cables (Red/White/Yellow) and set up the PS3 display settings. To get there from the XMB bar, go to Settings > Display Settings. You might have to disconnect the HDMI cable from the PS3 before the RCA cables work. I don't remember entirely.
Select Video Output Settings > HDMI > Automatic. If you can see the prompt about a max resoultion of 1080i (with your HDMI cable plugged in) you should be good. Select Yes and press X to continue. You can set up the audio but it's not necessary. Select Finish and you should be good.

I dont have a TV with HMDI input but i do have a computer moniter. To change i have to press a button that changes from VGA to HDMI. My computer supports HDMI and when i tried it, it works. Try looking in your manual for a way to switch input methods.

dont use high volt arcing can do lots of damage. unless you can be sure comtng from speaker.