Imac damage aftermath (Tube replacement?)


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Imac damage aftermath (Tube replacement?)

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puffie40
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Jul 3, 2009, 4:47 AM

Post #1 of 3 (86 views)
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Imac damage aftermath (Tube replacement?)	Can't Post

I know this is not exactly a TV, but since it involves CRT's, This should be on track enough ...

I just finished replacing the analog board on a slot-loading Apple Imac (Family M5521) and I had forgotten to connect the anode sucker-cap back to the tube before I powered it on.

There was a bit of a crackling noise as swarms of electrons surged somewhere, and while the computer will boot up normally, the monitor will not start.

I CAN get video out of the 'mac via external monitor, so I'm pretty sure nothing else was damaged, but I'm scratching my head over what I fried and how I'm going to fix it.

This one uses a LG CRT, the Number on the analog board is 6870T194A11, and a sticker on the tube has the number 6150z-3213f

(This post was edited by puffie40 on Jul 3, 2009, 4:52 AM)

rrobor
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Jul 3, 2009, 9:49 AM

Post #2 of 3 (80 views)
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Re: [puffie40] Imac damage aftermath (Tube replacement?) [In reply to]	Can't Post

24 kv sparking in logic circuits its anybodys guess as to what died.

puffie40
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Jul 3, 2009, 4:57 PM

Post #3 of 3 (70 views)
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Re: [rrobor] Imac damage aftermath (Tube replacement?) [In reply to]	Can't Post

Thanks! I actually needed a hint as to where I needed to look, and this helped immensely. I pulled the CRT plug off the old board and swapping that out made the monitor start up! Thank you very much!

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