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<DIV><FONT face=Arial size=2>Could it be the PSU has a component with a heat
related fault? I'd suggest try swapping it out with another and see if
problem persists.</FONT></DIV>
<DIV>Kind regards<BR>David</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=matt.poff@headfirst.co.nz
href="mailto:matt.poff@headfirst.co.nz">Matt Poff</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mythtvnz@lists.linuxnut.co.nz
href="mailto:mythtvnz@lists.linuxnut.co.nz">MythTV in NZ</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, February 07, 2009 11:46
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [mythtvnz] Help
troubleshooting signal interference</DIV>
<DIV><BR></DIV>It's fairly grunty - a RaidMax 380 Watt unit:
<DIV><BR></DIV>
<DIV><A
href="http://www.tigerdirect.com/applications/searchtools/item-Details.asp?EdpNo=1648607&sku=R456-1002">http://www.tigerdirect.com/applications/searchtools/item-Details.asp?EdpNo=1648607&sku=R456-1002</A></DIV>
<DIV><BR></DIV>
<DIV>Not near the machine currently so can't try disabling the additional
SATA. Here are the system specs of the box:</DIV>
<DIV><BR></DIV>
<DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica">AMD Athlon 64 X2 Dual Core
3800+ Socket AM2 Processor<SPAN
style="FONT: 13px Helvetica"> </SPAN></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica">Geforce 7600GS 256MB DDR3
Graphics card<SPAN style="FONT: 13px Helvetica"> </SPAN></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica">1G DDR2 667 RAM<SPAN
style="FONT: 13px Helvetica"> </SPAN></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica">320GB SATA2 7200rpm HDD<SPAN
style="FONT: 13px Helvetica"> </SPAN></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica">18x DVD-R/+R, Dual Layer DVD
writer<SPAN style="FONT: 13px Helvetica"> </SPAN></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica">500W Raidmax Power supply<SPAN
style="FONT: 13px Helvetica"> </SPAN></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica">MSI K9N Neo-F Motherboard,
Socket AM2 Motherboard<SPAN style="FONT: 13px Helvetica"> </SPAN></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica">Silverstone Lascala
SST-LC16S-MR ATX Home Theatre Case, Silver (has 2 built-in fans).</DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica"><BR></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica"><FONT class=Apple-style-span
size=3><SPAN class=Apple-style-span style="FONT-SIZE: 12px">Not convinced it's
an under-powering issue though as I wouldn't expect to see the interference
still occurring on the TV video-input when the Myth box is powered
down (but still plugged in with the main power switch on).</SPAN></FONT></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica"><FONT class=Apple-style-span
size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px"><BR></SPAN></FONT></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica"><FONT class=Apple-style-span
size=3><SPAN class=Apple-style-span style="FONT-SIZE: 12px">Noticed a few
posts on the web where people were reporting electrical leakage into ATI
graphics cards affecting outputs. I'm wondering if an earth from a case screw
onto the RCA-connector (plugged into the S-Video->Composite converter that
came with the Gfx card) might be worth a try. Still - it's run fine for a year
and a half so can't understand why it's a problem
now. </SPAN></FONT></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica"><FONT class=Apple-style-span
size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px"><BR></SPAN></FONT></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica"><FONT class=Apple-style-span
size=3><SPAN class=Apple-style-span style="FONT-SIZE: 12px">Will take a DVI
monitor home and see if that outputs signal OK - perhaps the aforementioned
converter is faulty?</SPAN></FONT></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica"><FONT class=Apple-style-span
size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px"><BR></SPAN></FONT></DIV>
<DIV style="MARGIN: 0px; FONT: 10px Helvetica"><FONT class=Apple-style-span
size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px">Matt</SPAN></FONT></DIV></DIV>
<DIV><BR></DIV>
<DIV><BR>
<DIV>
<DIV>On 7/02/2009, at 11:30 AM, Douglas Pearless wrote:</DIV><BR
class=Apple-interchange-newline>
<BLOCKQUOTE type="cite">
<DIV>Are you running near the limits of the power supply? (What size is it?
<BR>If it only requires a 4 pin extra power plug for the motherboard,
then I <BR>have a spare you could borrow to troubleshoot).<BR><BR>If you
remove the extra sata drive, does this fix it?<BR><BR>Douglas.<BR><BR>Matt
Poff wrote:<BR>
<BLOCKQUOTE type="cite">Over the last couple of weeks my MythBox has
developed some weird <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">signal interference which obliterates the picture
feed to the TV. <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">There have been no electrical wiring changes in
the house or new <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">appliances plugged in so it's a mystery. I
unplugged every other <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">device from the mains running off the same dual
socket except the TV <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">and Myth box and unplugged everything else (audio
jack, DVB-S feeds <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">etc.) from the box but the interference persists
even when the Myth <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">box is not running. I even grabbed an
extension cord and fed the TV <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">and Myth Box of completely different loops with no
effect. Only when I <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">actually turn off the power switch at the back
does the interference <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">stop.<BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite"><BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">I opened the box up to check whether there were
any loose cables etc <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">but couldn't find any. The only change I've made
recently was adding <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">another SATA drive to the rig.<BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite"><BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">I'm assuming the problem stems from the power
supply but not sure how <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">to fix it? Do I need to ground the box in some
way? It's a purpose- <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">built PVR case (Silverstone LC16M) so should be
fit-for-purpose.<BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite"><BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">The actual supply of power is fine and the system
runs but the feed <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">out to the TV is borked. Turning the RCA jack
(good quality video <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">gold-plated) in the Video-In socket sometimes
improves the picture <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">fleetingly. If the system is unplugged from the
mains and left for 10 <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">minutes or so the signal is usually OK on the next
restart for half an <BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">hour or so before the interference kicks
in.<BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite"><BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">Any ideas how to fix or further troubleshoot
this?<BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite"><BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">Cheers,<BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">Matt<BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite"><BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite"><BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite"><BR></BLOCKQUOTE>
<BLOCKQUOTE
type="cite">_______________________________________________<BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">mythtvnz mailing list<BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite"><A
href="mailto:mythtvnz@lists.linuxnut.co.nz">mythtvnz@lists.linuxnut.co.nz</A><BR></BLOCKQUOTE>
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href="http://lists.ourshack.com/mailman/listinfo/mythtvnz">http://lists.ourshack.com/mailman/listinfo/mythtvnz</A><BR></BLOCKQUOTE>
<BLOCKQUOTE type="cite">Archives <A
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