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first of all sorry if im posting in wrong section.
i think i may have bricked my nc10 trying to solder on a second mini PCIe slot.
so i soldered on the slot and powered it up with the wifi card in the new slot and it powered up but no wifi card detected. so i turned it off and checked the card is properly in there and turned it back on, but then to my surprise it didnt want to power on.
now i see this weird thing with the green power LED when i plug in the mains connector it lights up and shortly after (2secs after) it turns off and turns back on again and slowly dimms off again and then remains off.
earlier i discovered that i can some times power on the laptop while the LED is still green, but after some mucking around with it the keyboard cable came loose so i opened it up and reattach it and so far out of 3 tries i cant get it to boot up.
i have no clue what’s going on, any one on the forums had or seen similar problems?
cookiepowa – Welcome to the forum
Check you have no minute solder bridges on the pci-e connector.
Also check all connections to the motherboard as well as the battery connector.Have you tried it with the wifi card in slot 1?
Hope this helps
Solder joints are good. no cold joints or shorts. checked around the board i dont see anything out of place
i pulled the whole wifi card off and still no luck
Should i try removing the mini pcie? I do have a hot air rework station
@cookiepowa 111081 wrote:
Solder joints are good. no cold joints or shorts. checked around the board i dont see anything out of place
i pulled the whole wifi card off and still no luck
Should i try removing the mini pcie? I do have a hot air rework station
If the solder work is perfect there is little to be gained by removing it.
Try a cmos reset by disconnecting the cmos battery or alternatively shorting the RTZ pins under the ram module.Hope this helps
Tired these while i took the whole board off
when soldering the port on i used liquid flux. im worried not all of it has evaporated and maybe cuasing a short. although i was told flux is not conductive. and no i aint got no alchole to prperly clean it off
@cookiepowa 111083 wrote:
Tired these while i took the whole board off
when soldering the port on i used liquid flux. im worried not all of it has evaporated and maybe cuasing a short. although i was told flux is not conductive. and no i aint got no alchole to prperly clean it off
Assuming the power brick is not u/s and the battery is not flat have you checked the voltage rails on the board. Also try a long press on the on/off button.
Flux is non conductive unless it has contaminants in it. I have used a craft knife before to carefully remove flux by running it very carefully and lightly between the component legs. Take care not to cut any tracks.
If you have a usb hdd lead check the hard drive on another pc.
Try isolating the problem to the motherboard by disconnecting the peripherals. ie camera etc.Hope this helps
@jeepers01 111084 wrote:
Assuming the power brick is not u/s and the battery is not flat have you checked the voltage rails on the board.
What is u/s. i checked the ac adaptor and 19v is comming out.
Would you happen to know anywere i can get a guide on where i can find test points for voltage rails
okay i think i know what happened now. this is the flux i been using:
http://uk.farnell.com/frys/02851h010/125ml-tin-solder-solution/dp/1554327
note to all dont buy it if you aint going to clean it off properly. the bottle says it contains zinc cloride and arcording to this:
http://www.smartmeasurement.com/en/wizards/flowmeter/flmtr_mag_conductivity.asp
it has a conductivity rating at 27600 micro Siemens per cm. which is 0.0276 S/cm.
if i remember correctly siemens in ohms is 1/S, there for 1/ 0.0276 = 36.2ohms/cm making it pretty conductive.
so i think i may have blow up a few n channel mosfet chips labelled 4232gm (because i saw smoke coming out of them)
http://www.alldatasheet.net/view.jsp?Searchword=4232GMi guess thier part of the dc-dc converting buck or boost circuits. and their not the only ones that may have blown up, i think its time to give up and buy a replacement motherboard on ebay.
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