Search results

Fount a broken trace above U7200. Restored it and unit is now powering on. This can be marked as solved, thanks Duke.

Liquid damaged board, replaced U7200 and surrounding components. All measurements as they should be. Checked unwire circuit and PP3V42, SMC_BC_AOK are present. Power draw on PSU 0.019 - 0.025. PPBUS_G3H = 12.6V PPBUS_S5_HS_COMPUTING_ISNS = 12.6V PPBUS_S5_HS_OTHER_ISNS = 12.6V PPDCIN_G3H = 16.09...

Hi folks, Can someone point me to a site/service where I can find this part? Searched on eBay etc but can't find the connector. Taking from a donor board is not an option as it it either melts or never comes off and I'm done wrecking boards for connectors I destroy anyway. Any help appreciated!

820-4924 that had no power and no light on the MagSafe. Replaced Q7180 and U7100. Magsafe LED now works but PPBUS_G3H is only 1V. Same after Q7130 was replaced. Power draw on PSU is 0.017 amps. History unknown, no liquid damage spotted. The schematic I have is password protected so can't...

A 820-3476 with no visible liquid damage but liquid damage is suspected (fan is gross but board is immaculate...). When powered on the fan spins, screen turns on and you can hear the chime. A few seconds after the chime you hear the chime again and before the chime can fully play, it chimes...

820-3476 came in as "powers on but no boot or video" but I get no power. PSU draws 0.109amps and SSD gets warm, without SSD the draw is just 0.030amps. Light on MagSafe is orange, no fan spin. Checked all the rails and PPBUS_G3H (12.6V) - PP3V3_S5 (3.3V) all check out. PP3V3_S4 is 0.445V but...

Yessir, trackpad was connected. Power to U5805 5.1V (pin 2), Z2_BOOST_EN 3.3V (pin 5)

Good to know, valuable info. Green light turns on after about 10 sec, stays on for 5 sec then turns off and stays off. When measuring C7005 I could have shorted pin 1 with the probe point 1mm above it thus shorting pins 1 and 2 of U7000. Could that have done it? Not sure if that's what...

Resistance 17/18 = 2.6ohm, 27/28 = 20.3ohm. GPU has not been messed with from what I can tell. PPBUS_G3H = 7.4 mega Ohm and dropping PPVIN_S5 rails = 5.7 mega Ohm and dropping (keeping same value as PPBUS_G3H) PPDCIN_G3H = 0.L PP3V42_G3H = 12 kilo Ohm PP5V_S5 = 093.5 kilo Ohm PP5V_SUS = 073.8...

14.87V pin 2 of U7000, 27/28 is 23ohm, 17/18 is 3ohm

R5806 both pins 0V

This board came in as "no power" Found it responded to SMC reset, fans pinned but no chime and no display power/image. MagSafe LED green at first then orange. Re-attached 14 pins of the bottom RAM bay and set off to measuring. Found PPBUS_G3H to be 9V with the battery attached and 12.6V when...

R5806 is present. No R5800 on this board but checked L5800 and C5800 (assuming you made a typo) and those are not on the board. According to schematic they should be there? It doesn't mention OMIT or NOSTUFF but the pads have not been used, checked a few donor boards and they don't have those...

Noted. PPBUS fluctuates rapidly between 12.04 and 12.6V

History unknown but doesn’t look like anyone has been in here before. Q7080 is also on that line according to the boardview so that’s where I also measured, is my bv messed up? PPBUS at 18.5v, drawing from memory so if that’s not accurate I can re-messure later. Number looked right at time of...

J5800 diode mode all pins 1: 0v 2: 0v 3: 0.681v 4: 0.682v 5: 0.682v 6: 0.682v 7: 0.681v 8: 0.681v 9: 0.655v 10: 0.680v 11: 0.680v 12: 0.680v 13: 0.680v 14: 0.931v 15: 0.681v 16: 0.681v 17: 0.446v 18: 0.L 19: 0.L 20: 0.688v 21: 0.520v 22: 0.359v

Howdy folks, Building on another post: https://www.rossmanngroup.com/boards...ssing-pp3v3_s5 Same issue. Green light all G3H rails OK but at PP5V_S5 and down all I get is pulsing. SMC_PM_G2_EN and S5_PWRGD pulsing. SMC_PM_G2_EN does not pulse at Q7080 but does pulse everywhere else. Also...

820-3115 came in as no power. Replaced U7200 and power was restored. Intermittent keyboard and trackpad only clicked, didn't track. Light on MagSafe would be green for 10 sec, then off for a few sec, then back to green. Replaced U5701 and keyboard is now 100%, MagSafe LED also acts normal now...

As far as I know, I’m the first one in here. I cleaned a few sections of the board with alcohol as they did not look 100% (dirt, no corrosion) and found that the whole upper section of the board is covered in a film of something greasy. Alcohol is repelled. It’s not visible but I can scrape it...

Checked the ram bay pins, they're all OK (I've only seen those come off in 2012's, is this a common issue with 2011's as well?). Tested with 2 other A1322 batteries and slow performance persists. If the SMC was at fault, wouldn't all the tests point it out?