I am working on this laptop Thinkpad X240 that sometimes operates normally sometime times fails to P.O.S.T.
When it fails to boot I have found all rails to be good except CPU VCORE which is missing. I traced it to a missing PWM signal on VT1329M. Inputs of 3.3v and 1.8v are good, VR- enable is good.
Not sure about VIN_UVLO which is at 0.5v and 5v before resistor, since this is low voltage lock out could be an issue.
Not sure about CPUCORE_PWRGD, it has 3.3 on resistor R1000 but nothing on Pin 21.
When in normal operation I get 0.68v on pin1 ...
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Lenovo Thinkpad X240 missing CPU vcore voltage
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Re: HP17-by1033dx bios dump
I will try, thank you
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Re: HP17-by1033dx bios dump
This is the windbond W25Q128JV, main bios chip
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Re: HP17-by1033dx bios dump
The chip was removed from the board when I dumped it
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Re: HP17-by1033dx bios dump
oh no I reckon it got corrupted, that is all the data on the chip, is there no other plan?
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HP17-by1033dx bios dump please
I am looking for a working bios dump for HP17-by1033dx
I have attached original dump, Thank you
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Re: Acer AL1715
replaced 2 caps 220 by 25v, next to inverter transformers, and its working perfectly, thanks to alwaysafix for your help.
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Acer AL1715
customer came in complaining right side of screen is dim. The ccfls run horizontal top and bottom, connected other ccfls to the board and the lamps light up halfway on all four outputs. First time seeing this problem for me. Any ideas?
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Re: Samsung LE40B530P7W color problem
I did a factory reset from the service menu, but nothing improved. After I was looking through the service menu options and when I selected "DDR" which was set to "line" it showed two options samsung and etron (there was no "line" option) so I set it to "samsung". Powered off then on and the picture was normal again. Hope this helps others in the future. Thanks for your help....
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Re: Samsung LE40B530P7W color problem
Is there any chance of losing settings that can cause other problems, Country-Greece, 220 volts
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Samsung LE40B530P7W color problem
Had this TV since new, turned on today and colors are messed up. Tried all sources, same problem. Did a reset (exit button for 12sec). Took back cover off, caps on PSU look good, reseated all cables to main board and tcon.No Luck. Any ideas to help with diagnosics. Thanks in advance....
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