I have a Hitachi 50v500 that we bought in 2004. It had the engine replaced after about a year or so due to the infamous red shift, and I just replaced the entire lamp unit myself the other day.
I have noticed that the fan will not stop running even when the unit is turned off. If I unplug it, it ceases, but starts again as soon as it's plugged in.
I'm pretty irritated. I bought the lamp thinking I was avoiding purchasing a new TV for a while, but I'm full aware of what can happen if this fan goes out. (not to mention it's annoying to hear the fan running all the time even with the device off)
I am looking for advice from people who know or who have had this issue about what to do. I thought of seeking a replacement fan, but the fan works...it's probably a relay issue I'm guessing.
Any help would be appreciated