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07-04-2012, 03:12 PM
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#1 |
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New Member
Join Date: Dec 2010
City & State: SE Minnesota, USA
Posts: 8
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Gateway Profile 4, 2 Seconds to Black
Hello,
I just replaced 4 kzg 1500 ufd 16V (swollen) caps on the main board of a Gateway Profile 4 with 2 seconds to black symptom. (Display visible with flashlight) with 4 25V Low ESR caps. (A Profile 4 is a combo PC and display No change in the symptom. A Gateway Profile thread from 2005 shows two types of main boards, mine is more like the "improved" one with a large heat sink near the caps. I haven't removed the metal backing from the LCD display. I guess to avoid appearing totally newb, I'll do some more searching on this site about testing inverters and CCFL's. but if you are familiar with specifics of this Gateway chimera, I'd be interested in some leads. Thanks! |
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07-04-2012, 03:22 PM
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#2 |
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Radioactive
Join Date: Aug 2007
City & State: tehas
My Country: US
Line Voltage: 120VAC 60Hz
I'm a: Professional Tech
Posts: 1,976
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Re: Gateway Profile 4, 2 Seconds to Black
if you can find the actual inverter circuit, it might be some tiny startup caps near that
__________________
Capacitor Database: 8.3% finished - Need Help! PM me Cap Datasheet Depot: http://www.paullinebarger.net/DS/ ^If you have datasheets not listed PM me |
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07-04-2012, 04:31 PM
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#3 | |
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Badcaps Veteran
Join Date: Apr 2010
City & State: Canada
Posts: 8,078
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Re: Gateway Profile 4, 2 Seconds to Black
Quote:
a) bad caps b) bad ccfls c) bad ccfl wiring (especially the return wiring) d) bad secondary windings on the inverter transformer More details starting with post #19 at http://www.badcaps.net/forum/showthread.php?t=10419 Also, see budm's Inverter tester using old CFL http://www.badcaps.net/forum/showthread.php?t=19987
__________________
--- begin sig file --- If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post. We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings. Please do not post inline and offsite as they slow down the loading of pages. --- end sig file --- |
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07-05-2012, 05:48 AM
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#4 |
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New Member
Join Date: Dec 2010
City & State: SE Minnesota, USA
Posts: 8
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Re: Gateway Profile 4, 2 Seconds to Black
Thanks for the replies and the links, I'm studying one of those now.
TheZuke! dona nobis pacem |
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07-06-2012, 12:47 PM
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#5 |
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New Member
Join Date: Dec 2010
City & State: SE Minnesota, USA
Posts: 8
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Re: Gateway Profile 4, 2 Seconds to Black
There are a bunch (10+) of silver colored caps on the board as well, the tops have a blue part (negative lead mark?) and 860 4V, are these also "usual suspects"?
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