Would an LNB just die?
Discussion
Never posted in this section before, but having browsed it many times I'm aware that there are some knowledgeable people here. 
So, I switched the box (Technomate 5402HD) on this morning to be met with No or Bad Signal. This was on 10 degrees East (Eutelsat W2A)
Then decided I'd try another sat, (USALS motor) but again the same response.
Checked the dish over visually and it seems OK (pointing the same way as the others I can see when it's supposedly on Astra 28 degrees), and it's never moved in the 6 + years it's been up there, even with the high winds.
I've tried minor adjustments via the remote, East and West but with exactly the same results. Signal fluctuating between 25 & 55%, which I'm never going to get a picture with.
I can only suspect the LNB, more through a process or elimination than anything else.
Would it just die like that though, or is it usually more a gradual thing?
Thanks for reading.

So, I switched the box (Technomate 5402HD) on this morning to be met with No or Bad Signal. This was on 10 degrees East (Eutelsat W2A)
Then decided I'd try another sat, (USALS motor) but again the same response.
Checked the dish over visually and it seems OK (pointing the same way as the others I can see when it's supposedly on Astra 28 degrees), and it's never moved in the 6 + years it's been up there, even with the high winds.
I've tried minor adjustments via the remote, East and West but with exactly the same results. Signal fluctuating between 25 & 55%, which I'm never going to get a picture with.
I can only suspect the LNB, more through a process or elimination than anything else.
Would it just die like that though, or is it usually more a gradual thing?
Thanks for reading.
My limited experience with motorised dishes is like you said the coax Carry's the power so if the dish is still moving then it would still be 100% Yes LNB's can just stop working, they run on voltage and things internally can blow. Like you said the cheapest option would be to replace the LNB first, if you still have problems you need to check the alignment with a proper meter.
Sorry, forgot to come back on this one.
Yes, it was the LNB. Absolutely dead, both vertical & horizontal polarities.
Checked all cables, everything was fine, put a new one in, checked the skew and away we go.
Never had one go just instantly though, that's what threw me.
Thanks for all the replies.
Yes, it was the LNB. Absolutely dead, both vertical & horizontal polarities.
Checked all cables, everything was fine, put a new one in, checked the skew and away we go.

Never had one go just instantly though, that's what threw me.
Thanks for all the replies.
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