Top 20 Sony FD Trinitron WEGA KV-27HS420 27" TV Questions & Answers

there could be 2 issues with your TV one is the lamp and the other one is thew power supply board or if you have a click sound in the back is going to be a ballast issue.

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

Visit the site named 'Electro-help' for more details. Click this link. View it in 'Flip card' option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 975 posts to different brand TVs now.

Visit the site named 'Electro-help' for more details. Click this link. View it in "Timeslide" option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 1000 posts to different brand TVs now. Pull up older posts there.

Check and replace its tuner. It is faulty. Visit the site named 'Electro-help' for more details. Click this link. View it in 'Flip card' option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 900 posts to different brand TVs now.

Both the said sections are on separate PWBs inside the TV

Almost any Sony TV remote should work for this set--if trying for a universal Google the model number of the Remote for "manual" which will have instructions and a list of codes to try.

1. Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.

For more details, just type in the site name "Electro-help" to your search engines' search box [not in the address bar of your browser], and click search. It is an electronic equipments service help site. All details you want are there. Note the position of hyphen in between words in site name, when you type it in. The site will appear as it is in web; subtitled as Service help to electronic home entertainment equipments.

Pull up older posts. You can get all details.

You can locate it either at the bottom part of first search page, or at the top of second page. Detailed descriptions are there to help you. Sometimes, clicking on advertisements by the side and bottom of each post might help you to get details about the availability of spare parts; price etc:-

Hello
Its HOT [Horizontal Output Transofrmer] section circuits has the trouble. There are two possibilities for this fault. The first one is shorted HOT itsef. It can be replaced; and can be bought from most of the electronic sparepart shops at your town. It will have a number printed on it, and should benoted. Must replace with same number. The second fault is with leakey Horizonal Output Transsistor. This is the transistor that drives the HOT said above. Just repalce this transistor first. After replacing it, just switch ON the set for a few seconds; say 5 seconds or so, and check the heat of the replaced transitor. If it overheats within this time period, HOT is defective and should be replaced. OK.

Hi,
Please confirm tv model number as question shows it is Sony KV-27HS420
Model number is important info to diagnose reason of 7 times red light blink.
Thanks.

Most of the time this is caused by two ic chips on the circuit board, ic8001 and ic8002. These are components that can be replaced fairly reasonably. If you call a repairman it should cost 95-165 us dollars. However, this is just an educated guess. Good luck, Russmann.

Hi,
Is it Sony KV-27HS420 tv or any other model?
How old is this tv?
Thanks.

There is an apparatus on the back of your picture tube called a yoke.This distributes your picture on your pic tube uniformly.If this or the circuits enabling it malfunction,then you will get distortion-namely an hour glass shape.Tv has to be trouble shooted.

If you include how many times the standby light flashes, that will give a fault location. Not to worry, here is a list.
Hope this helps.

• Unit is dead, No blinks - Problem in the standby power section. Might check fuse, R607, Q601, IC601, R612 and VDR601 (should show open).
  

• Continuous blink once a second, no pausing - No reply from the jungle IC301 (data bus is busy, shorted to ground, or held high), IK video path is defective.
  

• One blink - not used for the self-diagnosis
  

• Two blinks - B+ over current protection (OCP), unit goes to the standby mode then displays the 2 blink fault. Could be a short in the power supply of any of the circuits.
  

• 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
  

• Five blinks - AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. In addition, unit could be in IK blanking, try turning up screen slightly.
  

• Six blinks - No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately. Check C515 & 516 and the jungle IC, IC206.
  

• Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.
  

• Eight blinks - Problem with the audio (AUDIO), unit goes to standby and blinks the self-diagnosis code. Check IC406 audio amp, PS401, and 402. On some projection models of Sony TV sets, this code means that T8005 (flyback transformer), or the associative components in the high voltage circuits are defective on the D board.
  

• Nine blinks - Replace D 6116 and D 6301 on the "G" board, do not resolder as this will fix the problem temporary. Or Panel Module Error or Thermal Error. If it is intermittent 9 blinks, meaning sometimes the TV comes on and other times you get flashing, then change the switching regulator on the "G" board or check connections. Make sure the regulator is -12 or -13 (negitive).
  

• Ten blinks - Check Q8014 and Q8013 for shorts, leakage, or bad solder connections on the " D" board. If the transistors are bad, check R8051 and IC8005, also on the "D" board.
  

You should have buttons on the remote for the TV which are SWAP and FREEZE and PIP. Pressing PIP should turn picture in picture ON and OFF each time you press.

Power supply board of either this could be a lamp issue

Yes, its time for new tv when existing tv start giving such problems, buy new tv and get rid of old one for peace of mind tv viewing.

Check compositers and power supply.Alot of times the compositers will be damaged being swelling up.Another way to go would be to replace the whole power board .If you look on the power board you can see what compoiters that are damaged.With this being said the tv will tv on like if wants to turn off the out it goes.

try this..press the set up button infront of the TV control... not the remote control.... and try all the menus.... it worked with my TV... or I just get lucky!!!!. It would be nice to know that I will be able to help someone....