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that came with different symptom - it started normally and then slowed down after sometime (what the customer said at the very beginning) - I did rush a little to be honest and without using ASD I replaced the BIOS with one that I personally cleaned the ME Region retaining the original serial...

I will try to find an LCD assembly. GPU is known to be good since it was replaced with new BGA using Fineplacer PICO RS system and was probably the 1xxxth I have done so far - a job where we provide 12 months warranty - only reason I mention this is that for me this is now a routine operation...

Hi guys, I got a similar issue with this thread: https://www.rossmanngroup.com/boards/forum/board-repair-troubleshooting/10654-820-2915-missing-lcd-power-enable This is is the hi-res LCD model which is missing LCD_PWR_EN. We have the following going on: 1) There is picture on external...

ok this was the solution: RE-ENABLE secure boot as if you will use UEFI boot media and then DISABLE it again (asks for a 4-digit code + ENTER). It now boots from legacy USB and HDD. mofo computer - you were right of course - I just didn't have a spare HDD with UEFI installation and since I made...

good luck dude! hope you make it to SMT in Nuremberg (just for fun and a visit to Europe, nice city as well) and then we could meet in person... NY is on my schedule for this year (hopefully). Kick some ass in Nebraska.

what if you just bathed it in alcohol? and while dipped press the keys to get the sticky shit out of the way?

but I have already changed that in the BIOS. I enabled legacy boot and disabled secure boot options. I have tested these laptops in the past with Live Linux USBs. They fail a lot, mostly their BIOSes get corrupted or their 3.3/5V supply. I have repaired a few so far but only this one can't see...

well I have the backup BIOS so that won't be an issue but it does not boot anything either Windows 7, or Linux for that matter.. I was just wondering if you have seen this behavior (of not seeing the OS in the HDD) before.. cheers dude. we move on :)

Hi guys, I know this is not Apple but I think duke handles those, too. This one turns on properly, enters the BIOS if necessary but can not see OS in any attached media. Can see there is a HDD or a USB connected but won't load the OS (Windows, Linux, whatnot) Legacy boot is enabled, secure...

So I did some measurements and I get: 1) 3.40V at R5381 (SMBUS_CHGR_SCL) 2) 0V ar R5380 (SMBUS_CHGR_SDA) 3) PM_BATLOW_L is low when the charger in attached (with battery connected) and remains low for the following seconds 4) CHGT_BGATE is HIGH at Q7155 and does not charge the battery - the...

so you suggest I need a good battery? shouldn't this model boot without the battery like the rest? Or maybe should I check battery communication to the SMC? Maybe there is an issue there? I will try tonight..

this symbol appears for a few secs - with or without battery - and the laptop turns off. No fan activity at all.

it should start without battery but even then it shows the empty battery symbol, when the magsafe is attached, and nothing else. If you press On/Off button SMC_ONOFF_L goes LOW but nothing else happens. Also the fan does not spin..

but it shows the battery symbol without the battery connected, too... and then all voltages turn off.

12.2V to 12.4V (doesn't look thrilling) EDIT: 12.4V most of the time... dives to 12.3V rarely to 12.2V.

Hi guys, This one looked like it took a dive in an orange juice bucket. I UC it and then there was no green light. I looked around and SMC_BC_ACOK was missing while PP3V42_3GH was ok. The problem was U7100 which I replaced and voila there is green light and the CPU gets hot. I now half...

glad you take me back to the basics cause we sometimes take them for granted. Although I measured the resistors separately and even changed one, I did not measure the whole thing. One line was cut from R7051 (0 ohm) to R7050. I moved R7051 to the single pad just off its original place (to avoid...

[SOLVED]820-2914, green light ok, fans spin for 5secs, PPBUS_G3H 3.6 to 13.5V and loop. Hi guys, As per title, this one boot loops every few secs. Fans stay on for 4-5secs and loop. The PPBUS_G3H jumps from 3.4 to 13.6V when the fans are on. All voltages except PPVCORE_S0_AXG rise when the...

sorry for the late reply, ASD 3S162 (can also be seen on the window bar) - EDIT also if you could explain what you said above :)

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