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Author Topic: Monitor needs to warm up  (Read 2225 times)

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neil324

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Monitor needs to warm up
« on: April 07, 2010, 04:34:18 pm »
Ive a got jamma cabinet, not sure what monitor is fitted. When i turn it on there is no picture for a few minutes, it can also lose it once warmed up, especially when the cabinet is knocked.

Just wondering what the problem is, maybe a lose pot.

grantspain

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Re: Monitor needs to warm up
« Reply #1 on: April 07, 2010, 05:03:06 pm »
sounds like you have a dry solder joint somewhere

neil324

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Re: Monitor needs to warm up
« Reply #2 on: April 07, 2010, 05:39:38 pm »
Would'nt a dry soldering joint have reared its head before now though. Pretty easy to fix, the hard problems going to be finding it right. How would a go about finding it, with a multi meter, any tips where to start.

Kevin Mullins

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Re: Monitor needs to warm up
« Reply #3 on: April 07, 2010, 05:45:50 pm »
Would'nt a dry soldering joint have reared its head before now though.

A "dry" joint is usually a weaker joint that eventually cracks enough to have a noticeable effect.

Pretty easy to fix, the hard problems going to be finding it right. How would a go about finding it, with a multi meter, any tips where to start.

Shouldn't be hard to find, usually can be found visibly.
Remove the old solder, re-solder, done.

As for where to start, most monitors will have some very common areas to check, but much easier to point out if we know what model monitor you have.
Not a technician . . . . just a DIY'er.

neil324

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Re: Monitor needs to warm up
« Reply #4 on: April 07, 2010, 06:17:05 pm »
Can't seem to ID the chassis,any ideas?

Ok its a Kortek KTM-20
 
« Last Edit: April 07, 2010, 06:19:14 pm by neil324 »

kardenm

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Re: Monitor needs to warm up
« Reply #5 on: April 08, 2010, 09:30:01 am »
had a similar problem on a K7901. Was caused by bad solder joints on the flyback. Just resolder them all and see if that helps.
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neil324

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Re: Monitor needs to warm up
« Reply #6 on: April 11, 2010, 12:46:53 pm »
Just had a look at the monitor, the chassis board looked ok so then had a look a the small board at the end of tube and a solder joint had lifted from the board re-soldered it and its working fine again.

Must admit don't like poking around a monitor, with all them 'high voltage' stickers every where :lol

Thanks for the advice.