Question about B&K Precision Computers & Internet
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Posted on Jan 02, 2017
SOURCE: POWER SUPPLY UNIT
A voltmeter would be helpful here. If the proper voltage is being supplied to your computer power supply, then the computer power supply itself is defective. You could use the voltmeter to verify this, or just merely bypass the regulator- plug the computer directly into wall current, assuming here your wall current isn't terribly out of tolerance, or terribly dirty - spikes, sags etc.
I have seen several computer power supplies which are slow to come on. The problem is often electrolytic capacitors in the power supply circuitry - probably in the standby +5 volt supply (this powers a tiny part of the circuitry on the motherboard). The voltmeter could be used to check this out also.
If this is the problem, it will likely get worse, to the point where it won't power up at all. Whether you want to replace the capacitors, or just swap out the p.s. is up to you. If the p.s. is a high quality unit, repairs might be suggestable, especially if you have some technical skills.
Posted on Nov 07, 2007
I think you missed one cap. Look for another 1ufd cap close to the jungle chip. It will have the circuit designation in the 300's like the others in the vertical circuit. It is just not located close by. I think that one will fix it.I don't have the service data with me so I can't give you the exact designation.
Posted on Jun 04, 2008
SOURCE: Mag Innovison LT917S LCD Monitor
After looking at the description of the pin outs on the BIT3193 and following signals to/from that chip I discovered I had burned up one of the FETS that I had installed. With the FETS replaced for the second time the monitor works fine now. HEY!!
Posted on Aug 21, 2008
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