replying to Phil, Jason wrote:
Hi Phil
My Honeywell CM927 has a completely dead screen, tried replacing the batteries
with no luck. I now wonder if just the screen and it is still working ( as
summer not yet sure ). I will try pressing screen as nothing to lose and then
maybe taking apart tonight. Annoying as only 2 years old and costs £90 to
replace, I will switch to another brand if this does not work as cannot afford
£90 every two years!

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