On 08/26/15 16:59, jd1008 wrote: > On 08/26/2015 12:08 PM, g wrote: >> >> On 08/26/15 11:17, jd1008 wrote: >>> On 08/25/2015 10:36 PM, g wrote: <<<<>>>> >> ok, lets look at this another way... >> >> you say you are on ac, so that _might_ eliminate battery's voltage dropping, >> unless wall wart is failing, or failure in voltage regulatory circuits. >> >> ac input from wart is rectified in laptop and then feed to the various >> regulator circuits. it is possible that there may be a vlsi chip that >> does all the voltage regulating by feeding control voltages to output >> power transistors. voltage regulation can be done in many ways and only >> the oem knows for sure, unless supplied in specs or schematic. >> >> does laptop have indicator light to show battery/charge state, ac power >> state? > > Power supply's ac-dc circuitry is external. It feeds DC to the laptop. > . ok. ac/dc, does not matter. it is still good to know that wart is not dropping voltage. tho you should notice wart drop >> do you have battery state icon on a panel that you can watch? > > Yes. It shows battery at 100%. I hardly every am without AC simply > because I only need the battery if and when AC goes out. In my area, > it doe shappen, albeit, not as often as it was happening elsewhere. > >> if icon shows >> a state of 100% that later drops, that will give a clue of problem being >> in voltage regulator circuit or in usb port chip/s. > . > No. It stays 100%. > . ok. that tends to indicate problem in voltage regulator circuit. <<>> >> because you have failure on one side and not other, tends to indicate that >> each side is on a separate regulator circuit. left side regulator could be >> heating up and failing. > > That is a possibility, because the heat exhaust vent is next to the left > site ports. > . fan blowing heat from cpu would not tend to be a problem. monitor exhaust temp from start up to when usb ports drop power. >> which brings to mind, is this same laptop you inherited that had over heated >> and you replace cpu, then found it to be gpu? > > Nop. That laptop is fubar. it has the same behavior as before, even less > than one minute after powering on and booting. > . it was probably due for the big gold recovery in the sky when i over heated. <<>> > Well, I do not know. If it has internal regulators, they must be > receiving DC and regulating the DC voltage, due to the fact that the > AC->DC adapter is external to laptop. > . it has them. wart supply has to be drop for the various ic's in system. which are discrete transistors, various ic's, like ssi, msi and lsi, cpu, gpu, ram, rom, usb. plus, the screen could have several voltages for it. a lot of laptops feed screen with 1 voltage and in the screen housing are regulators and hv inverters. being you gained experiance of opening up laptops, you might consider doing so with this unit and check temps of the chips. mainly the usb and the regulators. again, it could be regulator for left side usb and could be cured with fresh heat compound. -- peace out. If Bill Gates got a dime for every time Windows crashes... ...oh, wait. He does. THAT explains it! -+- in a world with out fences, who needs gates. CentOS GNU/Linux 6.6 tc,hago. g . -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
