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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Power controller chip to turn on ATX
Hi Guys,
I have got a mobo here that is dead. I have done all the usual stuff like trying new PSU, bench testing etc. Its dead - as in no fans, no nothing when you hit PWR button - PSU doesnt even come on. I connected the ATX molex from the PSU and shorted Green (PWR ON) with GND on the molex and the PC came on. All seemed fine. I think there is a IC on the motherboard between the PWR BTN headers from the power on switch and the ATX header on the mobo that tells PSU to start up. I am trying to find this IC. I have attached a image of the mobo with some of the IC's that seem possible labelled. http://www.badcaps.net/forum/attachm...chmentid=12082 Interested to know if anyone knows which IC controls the PSU and tells it to turn on? Someone else suggested this function was handled on the CPU since P4, but I am not sure about that. Thanks -Al RT9237 : http://www.alldatasheet.com/view.jsp?Searchword=RT9237 93705CF : http://www.ic2ic.com/search.jsp?sSe...3705CF&prefix=9 952001AF : http://www.alldatasheet.com/view.js...chword=952001AF 2N03L : http://www.alldatasheet.com/view.jsp?Searchword=2N03L08 LD117 : http://www.st.com/stonline/products...fo/ld1117_1.htm RT9602 : http://www.alldatasheet.com/view.jsp?Searchword=RT9602 |
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