On Wed, 29 Dec 2004 15:24:15 +0800, "Alan Rutlidge"
<rutlidge@<No_Spam>.iinet.net.au> wrote:
>
>"Rap§cal" <pbromley@hotmail.com> wrote in message
>news:kf64t0dliia7lgmd6n0u34cg8efjtmlrlq@4ax.com...
>> My Sanyo Z2 (bought March 2004) has suddenly developed some large
>> yellowish/greenish blobs on the screen. One moves a bit like a hair
>> blowing. They're only noticable when the image goes very dark.
>> Any ideas how to fix this?
>> I read somewhere that using a cool hairdryer might help?? Sounds
>> risky.
>>
>> Any places in Melbourne that
>> Was purchased from Pricejapan so no local warranty (I assume).
>
>Hate to say this, but from your brief description it sounds like one of the
>LCD panels inside the projector has become overheated and damaged. This is
>a common problem where the power to the projector has been cut or switched
>off at the main power switch on the projector or the power outlet it was
>plugged into while the projector is still running.
>
>As you have probably noticed, when you turn off your projector normally
>after a viewing session, the lamp goes off but the cooling fan continues to
>run for up to 2 minutes after switch off. What this is doing is cooling the
>LCD panels so as to prevent damaging them due to heat stress.
>
>Another common cause of the same fault is setting the "no input" status to
>display a black screen and then leaving the projector in this state whilst
>the lamp is still on for an extended period of time. The black pixels on
>the LCD panels become a heat sink causing the small glass panels to become
>extremely hot and this almost certainly contributes to failure and
>displaying the classic symptoms you describe.
>
>Expect an expensive repair bill. :(
>
>If however this is not the fault (one can only hope so) it might be dust.
>However in my experience with other models of LCD projector, dust problems
>often manifest themselves as what looks like out of focus pink fuzzy blobs.
>Try watching the projected image whilst manually adjusting the focus in and
>out and see if you can get a focus on the blobs and the video image out of
>focus. If this is the case, dust is most likely to be the culprit. There
>is a cure: Get a professional repairer to clean the LCD panels, the external
>lens elements and replace the dust filter with a new one. If you have the
>tools and the know-how you may want to attempt this yourself, but you will
>need to exercise some care.
>
>Cheers,
>Alan
>
>
Thanks Alan.
I've always been very careful not to let the unit overheat or switch
it off 'til it's ready so I'm hoping it's the dust!
PeterB