Summary: I bought this tv 15 months ago and I started to have problems with it right after the 12 month. I did not buy extended warranty trusting a name like SONY. I have researched a lot and apparently all the motherboards in this model can and go wrong eventually. My tv just won't turn on out of sudden. Please read for yourself on this problem on other reputable sites. DO NOT BUY it. As far as customer service SONY has lost me FOREVER.
Summary: I had my KDL40S4100 for a little over 2 years and the LCD panel is going. Thankfully I purchased a warranty from the store instead of SONY(Soounds like they are a nightmare to deal with). I always tried to purchase SONY products because I've had some great luck with them but, this TV only lasting 2 years wasn't so good. I would still use their other products but, am going with Samsung after this.
Summary: Lets start off with the faults: 1. Sound randomly starts to stutter and drops out. Then randomly stutters and comes back in. Sony repaired 3 times each time it came back the same way it was sent off..with random audio drop outs. 2. HD picture quality is ok. SD picture quality is flat our horrible. 3. Blacks are almost grays and where you should see a gradual change in colors such as in a evening sunset there is obvious banding. 4.
Summary: I originally purchased a 32 inch Sony Bravia HDTV, and then I saw this one on sale here... so I purchased it without hesitation. $50 more and I could get a 40 inch! Great TV... can't believe it was so inexpensive. No freeze frames, good color. Very happy.
Summary: The picture of this TV is OK. The audio is really bad. 1. random crackling static 2. tinny speakers 3. rca audio jacks will not work while using hdmi for video only, even though manual says it should work.
Summary: I decided to rate this TV after I saw another Sony widescreen model at my friend's and realized how mine is SO much better. First, if offers plenty of HDMI outlets (for my DirecTV, Roku/Netflix, and Blu-Ray DVD) on both the back and side. The image quality hardly needed any tweaks out of the box. The remote (only used when switching outputs) is so ridiculously easy that even my mother can figure it out.
Summary: I bought this TV just before Christmas 2009 and it has has not worked properly since day 1. First of all, The HDMI inputs didn't work all the time. Periodically when turning the TV on, there is a picture but no sound, or sound and no picture. Reseating the HDMI cable fixes it temporarily. The TV also pops loudly and reboots itself 3 or 4 times a week. Sony farms out repair to a local company and the local guy said Sony has had problems with direcTV DVR's.