My HP Envy has started to have an intermitant problem. On start up the screeen becomes scrambled just a patten of pixels. At first thsi was just a series of balck and white stripes and if i turned the machine off and on again it would disappear. The last two times however this has become an array of colour pixels regular but nonsens almost tartan in appearance. It is also impossible to egt any response from the touchscreen or the track pad or an exteranl mouse. The on off switch merely seems to turn the screen blank or bring back the pattern it does not turn the machine off. This has happened twice and on both occassions the problem lasted several hours but when itried again after leaving the machine for a further hour or so it worked agian. it is working now but i now fear that the next time i switch it on the problem will reappear again. Any advice, has anyone else experienced anything like this!
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