Pinebook pro dead / keyboard issue? / Troubleshooting
#1
Question 
Hi, I've had my pinebook pro for a few years now and for the most part it did a pretty good job
sadly a few days ago i spilled coffee over the keyboard, and since then i cant get it to boot anymore.
after the spill i shut it down and tried to clean it off as good as i could, without opening up the case.

I started to do some troubleshooting, and hope someone here can help me with that, so that i can fix it, or at least order the proper replacement parts.

I have since opened it up, and noted some coffee stains in the lower shell, but luckily i could not find any on both the boards.
the battery seems to be in order as well, and removing it, closing the jumper and powering from socket produces equivalent results.

the only life sign i can see from the board is a blinking of the orange status light for a while after i (re)connect the flat-band cable to the keyboard
this only happens with the emmc module connected, and the switch enabled. An sd card with an linux image on it alone doesnt allow for blinking, the emmc seems to be necessary for it to occur.

My current theory is that some coffee must have come into the key nipples, shorting them and thus rendering the output unviable, i removed the keyboard from the upper case and tried to wash it as good as possible, it should be dry by know but it didnt help. sadly the keyboard uses a single nipple glued to each key, instead of a silicon mat like most full scale keyboards, so i cant be sure i cleaned it properly.

before ordering a replacement keyboard id like to make sure the mainboard is actually fine, but as the power button is part of the keyboard i dont know how i would be able to test that, is there some other way to power on the board that ive missed?
  Reply
#2
Update: shorting pin 25 and pin 26 (ground and PMIC_PWRON) on the keyboard connector seems to start a boot process, after a (rather long) while the status led turns green, however the connected screen stays black.
i assume the long time to turn greed is caused by missing peripherals, and that messes something up in the bootup process
  Reply
#3
Looks like coffee liquid may already damage the keyboard which is two layer of membrane.
  Reply


Possibly Related Threads…
Thread Author Replies Views Last Post
  Keyboard unresponsive after some idle time in uboot Trinatriumcitrat 1 236 11-25-2024, 03:42 PM
Last Post: KC9UDX
  Testing Some More Games on the Pinebook Pro! ImmyChan 5 3,932 09-24-2024, 01:43 AM
Last Post: pigkang
  Converting the Pinebook Pro into a CrowView Note like device 8jef 0 345 08-18-2024, 05:42 PM
Last Post: 8jef
  Pinebook Pro Initial Impressions kunger 443 683,431 04-16-2024, 07:29 PM
Last Post: KC9UDX
  looking to buy one pinebook pro (mainland China) duanduan 3 3,261 03-21-2024, 07:44 PM
Last Post: wangyukunshan
  Cellular module for Pinebook Pro Lotech 1 1,044 03-05-2024, 05:40 AM
Last Post: KC9UDX
  Screen on pinebook stays black but can ssh into machine tuxxpine 0 746 02-23-2024, 04:22 PM
Last Post: tuxxpine
  Sale my ANSI PineBook Pro cuthbertdavies 0 732 02-14-2024, 09:12 PM
Last Post: cuthbertdavies
  Compiling with -j6 on the Pinebook Pro (Overheat) KC9UDX 0 659 02-14-2024, 09:01 AM
Last Post: KC9UDX
  Pinebook Pro in EU for Sale - €90 jan_vdk 2 1,457 02-07-2024, 02:12 AM
Last Post: 23Ro

Forum Jump:


Users browsing this thread: 1 Guest(s)