Easy fix
Thank you Sudhanshu Grover!!
I had the same 4 blink code that seems to be so common with the Sony KV-27V40.
I replaced Q502, IC 601 and R606 per your recommendation and my TV is back in business!!
www.electronix.com had it all
IC601 = MX0541B
Q502 = 2SC5426-01
R606 = sony fusible resistor (exact value was not available, used a lower value resistance-- worked fine)
Cost less than $20 to fix. Set has been working fine for two months so far (since the fix!)
I also found the parts from an ebay retailer, but Electronix .com was cheaper
Hope this helps somebody else
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