820 3332 No Backlight, On board I replaced u9000 and lvds connector. Q7035 was blown in half with a minor hole in the board (just that top ground plane, easy to isolate and repair). When you turn on the Mac you hear the chime but the 2015 820-00163-A Faulty Logic Board For MacBook Pro Retina 15" A1398 repair $15. If we just take out Hello, I got this 820-3332 with green light OK, chime OK, no image. 06V) but LCD_PWR_EN is missing (no short to ground). Green Light on adapter. We moved from step to step until we pinpointed the source of the problem. Hello all, so I have an 820-3332 that had it's screen break off. Specifically interested in the SMBUS readings on the battery (SCL Hi, I have this weird computer which has pp3v42_g3h, and all the correct voltages on the sys_onewire circuit, but it is still not turning the led on. It boots up and chimes, but no image to the display or to HDMI. After replacing Q8930 and U8900 at the same Hi there! I have an 820-3332-A which was dead because of water damage, I removed the visible corrosion with a toothbrush and alcohol (yes I know). 820-3332 connects, but has no image or backlight, without thunderbolt and HDMI. 2 Quick observations : 1. Internal and external displays stay black until you close and open the lid a few times. I changed the LCD, no backlight and no screen, and no picture on external display. When I close the lid for some Q7706 / L7710 / Q7701 are all inactive because the system is probably not activating the backlight at all. Need a Device It should be the screen, replace the hinge that holds the lvds cable and it should be fine. on 820-3332 no green light, im a little confused , i have ppbus g3 and pp3v42, at u6900 pin 1 (sm_bc_acok) i have 3. the screen makes a little difference in lighting when powering on and off but the backlight does not come on. that is ok. I didn't spot any signs of water damage (just a tiny spot of green kaka on C3232 and C3233 but that seems to be Problem description Identifying and solving backlight issues on the 820-01521 logic board, as well as similar boards from 2016-2020. No change. . I checked: L8930 L8960 In this video we show you how to repair a 15" Macbook Pro Retina (2013 model with model # A1398) that has no backlight. A MacBook with no backlight on the display is experiencing an issue Image and display backlight are present while macOS is load but the display turns off before log in. No liquid damage for sure. The keyboard and screen backlights are both dead after liquid spill. This motherboard has already been got this 820-3332 and U8900 was burned, seen at the top, replaced it but still no image or backlight, anything else i should look at or dead ? board turns on, just no image or backlight hello, so first the macbook didnt have backlight, i have replaced the fuse and LCD connector because they were corroded, now the screen works perfectly, but the problem is that the Board was little liquid damage U7100 area cleaning and replace corroded components, Good charger know, PP3v42_G3H 2. To inspect backlight circuit Follow up to a previous post: ------- Hello all, So I have an 820-3332 that had it's screen break off. I've isolated all components. Be sure the backlight 820-00967 2017 iMac Pro A2115 iMac 27" 5K 820-01236 2019 iMac 27" 820-01779 2020 iMac 27" Radeon Pro 5300/5500 XT 820-01823 2020 iMac 27" Radeon Pro 5700/5700 XT * A1176 Mac mini Re: a1398 820-3332 battery problem no orange /green light Carefully measure the voltage on each leg of the battery. The Macbook suddenly went black while editing video. History: Previously going into kernel panic and having graphic issues. The laptop is working (hear sounds), but without image and backlight. WATCH TO SEE AND LEARN THE THOUGHT PROCESS THAT WENT INTO RESTORING BACKLIGHT Backlight repair for 820-3332-a 15” MacBook Pro HGS assist 497 subscribers Subscribe Hi, i have a problem with this board, liquid spill on the board, all the board clean. Then they both I'm working on an 820-3332 that had some sort of power incident. Try known good Known-good 2012 test screen. me/1cba2545👉 If our videos have added revenue to your business, consider becoming a patron🔵 Patreon https: Have 820-3300-B with image but no backlight Has no sings of liquid damage, already tried known good lcd Only strange thing I have found is that pins 38, 39, and 40 have 25v when on a In this repair, we followed a systematic approach to resolve the issue. Has flashing folder. Can you please help? Thank you! Let's get Right to Repair passed! https://gofund. Try known good 820-3332-A 2012 MacBook Pro, No Backlight I have verified it is no backlight and not no video. I changed keyboard and now the screen is black. 4 amps, has chime and MS light, but fans ramp up to max RPM and backlight comes on immediately when laptop is powered on. I got USB activity but no image on external display. im getting the 12. This troubl Hello, I got a MacBook Air 2020 M1 13i A2337, logic board 820-02016, able to boot, and works properly if I plug an external monitor and close the lid. Check for same voltage at pin 1/J9000. Before the PPBUS_S0_LCDBKLT1 in short to GND, after i have 12,58V, the Fuse F9700 is burn, i No chimes or Caps Lock behavior, no backlight. I'm trying to troubleshoot the charger circuit on 820-3332. Spill damage, but very minimal and nothing near LCD connector or U9701. I was able to very So, I have this 820-3332 machine I bought from eBay because I'm an idiot. Reflowed and resoldered U8900. Replaced U8400 and Q8400. If the GPU really is bad then our CMIzapper Tiresias should Hi, I have an A1398 820-3332-A that has no image (nither internal or external). i resoldered the u8900 but still nothing L8960 and L8930, L8310 and L8360 have no power at all the **Board View software used in this video, Created by Paul Daniels, is the only board view software available to the repair industry that has PDF integration Join Date: Dec 2019 Posts: 16292 Country: Canada #3 03-07-2023, 05:58 AM Re: A2338 820-02020 No backlight Also 50v is too high for the backlight voltage. How, if you don't get backlight enable? 56V output means no contact with LEDs strip from display; correct voltage 39V aprox. Fixed water damage and it worked perfectly. 5v on both sides of the backlight fuse. i dont have a spare screen to test. txt) or read online for free. The one-wire circuit is working but there is no PP5V_S4, no PP5V_SUS, no PP5V_S3, no Its a previous repair attempt, initially it wasn't turning on, fixed it and now there is no backlight, i checked backlight enable and that was low, so i tracked it and found that smc_lid is I noticed Q8930 was getting very hot, so I replaced it and at first time the board turned on, gave backlight but no VCORE/Video (brain dead). However the seller seems Have a 820-3332 that won?t show anything except backlight on internal lcd. it is a MacBook Pro retina 820-3332 The MacBook Pro starts and if i connect it to an external LCD i can see that it working Screen Issue: No backlight (flashlight reveals content). PPVCORE_S0_CPU is 0. Surrounding components are good. I know it has booted into the OS as I can hear the volume up/down adjustment sound. Any idea what I'm 820-3332 No backlight after liquid spill Hi, I have a macbook pro A1398 with a 820-3332-A logic board. Works fine with external. 3 different chargers. No backlight, no picture. However, there is no way to see Re: Macbook A1932 Intermittent Backlight Issue 820-01521 Hey! Have disconnected the trackpad and kept under observation. A2337 MacBook Air 820-02016 not charging, board repair Aesthetic Aura Heart Gradient 4K • Soft Pastel Pink & Blue Ambient Light • 2 Hours No Sound Screensa If no broken trace for backlight output, then try DFU revive. 4v pin 5 (adaptor_sense) i have 5. pdf), Text File (. I cleaned up Check the connector, cable, and LCD. I can hear the chime, but I have no image, even in external display. 63 + $8. Fuse? WLed? - Integrated monitor does not light up - If I point a flashlight I can see apple logo on startup and log-in succesfully Hey, i got a 15" MBP (820-3332) with no display an no backlight. As soon as I got it I could see melted plastic and ripped up screwposts near the gpu. iClub May 6, 2020 I am messing up the 820-3330 and the 820-3332 Resolder U8900, or check the GPU VCORE voltage with an oscilloscope. 2 Batteries. Already no backlight, no image appear on screen. No backlight. Screen is coming on for a split second. This board has problems when external Display is hooked up to Thunderbolt port. after that I took the board to Louis and it just turned on,,, around the right fan where its connected to 820-3332-A Boots and runs great. Only 0. Shining a light through the Apple logo, I can see an image so there is image but no backlight, i can use the laptop with external screen via HDMI, i have checked the board and found an damaged LCD fuse F9700, replaced it but this didnt solve the MacBook Pro A1398 -820-3332-B Work but Not Display and NO backlightVGA issue boot up but not display on screen, 820-3332 No backlight after liquid spill Hi, I have a macbook pro A1398 with a 820-3332-A logic board. On external you get apple logo but only loads quarter way before freezing with line above apple logo. Attached are V readings. There was then Re: A1390 820-3332-A No Backlight Hey! Once again thanks for your help, really appreciate it. unit has corrosion on c8513 PP1V5R1V35_S0GPU would this cause no backlight? because I wouldn't think I got on the table an 820-3332 that draws 1. i can see the Hi, I got this macbook with cracked LCD. It is turning I have an A1398 820-3332-A with no video. If backlight is PPBus voltage your boost circuit isn't working. This board A1398 Apple MacBook Pro Retina 15" A1398_820-3332 - Free download as PDF File (. do I have to replace the GPU chip Re: 820-3330-B A1286 Image, No Backlight Update, added some solder to the pads where the missing component was, took R7408 from 820-2530, soldered it to the pads on my 820 Ok so this board has been thru hell :/ Had water damage. Now have another retina assembly to test. I retouched the joints of U8900, nothing changed. gcain Dec 20, 2016 This one was dropped in with no backlight, F9700 was blown, so replaced this, as wasnt sure if someone had just killed it by changing a screen or getting it damp etc. After GPU replacement I had chime backlight and video again but red distortion in the background and osx HOW A TECHNICIAN KILLED THE BACKLIGHT OF THIS 2013 MACBOOK PRO 15INCHES. The client still used it for a few months untill it started to cut in and out (no hinges to Hello guys, I worked the past few hours on a 3332 Logicboard and I can't get it back to life. I´m trying to figure out if its a board problem, screen problem or This board was liquide damage arround lvds connector and lcd cable is damage too. I check some Hi, I have a MacBook came for changing keyboard as liquid damaged and keyboard sometimes freezing and not working. PPVCORE_GPU looks fine (1. This document contains a table of contents for a design schematic with hello working on a 820-3332-a logic board looks very clean, no liquid damage, under the microscope couldn’t find anything that looks bad the board is dead, no light on the charger. 9V and PPBUS_G3H 12. Heated GPU some and video returned. I have repaired the board so that the machine is running now. After I plugged off the power the machine did 820-3071-A is the code for RIO board. Fan spin normal. like the macbook isn't detecting the screen. No short to ground after the i cant get lcd enable to be sent, i can force backlight, i reflowed u8900, but was missing some rails, so i replaced it and the rails showed up, i now have pgood, but no matter what Gday guys I'm using schematics for 820-3332 so hope layout is similar. In this video I troubleshoot a common issue on 2013 15" MacBook Pro Retinas, the IC that provides GPUVCORE to the GPU develops cracks in the solder joints. Hello guys, i just got a 820-3332 15 inch retina MBP with no video. 15v, at pin 4 (sys_onewire) i have hi, i just got that board no video so i tested the lcd with a working board. The board # of the unit we work on in i have a 820-3332 that came in for no power, after diag realized its powering on fully just no internal display, checked smc_lid and realized it was 0, repaired and got screen for about 30 Hello, I got this logic board 820-3332, got a green light, both fans spin, no chime. when i press power button, fan spin and nothing more. Was putting back in top case and there was a bee in my room and I kinda maybe Hi, i have this board, no liquid very clean board. I also have the idea that the IC is bad, just want to make 100% it is before I can order it got a 3330 with 10. Q8930 now has a short and it does not turn on. If backlight is 0 check for short Those last three pins are the backlight pins so at a minimum you need to replace the LVDS cable. MacBook Pro A1398 -820-3332-B Work but Not Display and NO backlight Part 1 7. Replaced U8900 just to see if that might Solved: hi everyone, how to turn on backlight hp elitebook 820 g3 keyboard because on my f1 to f12 keys i dont find a f key that tuns on backlight - I have an 820-4924 with no backlight, computer does get an image backlight is just not present. Customer done work around u8900 with bad results - components moved - some The difference between commonly distributed boardview and real one is that there is no U7750 on board, and this is the source for BKLT_SCL + BKLT_SDA. Screen suddenly goes of. No Backlight Image is OK. The system needs to "talk" to the display before it will activate the backlight, since Don't lower yourself by lying; make customers humble when fixing 820-3330 boards with no backlight. 10 delivery Good day gentlemen, Today I have a 00165 board with no backlight. 45V at BKLT_EN_R Where No liquid damage. 3K views • 4 years ago 5:17 Have a 820-3332 with image issue. 5v all the way up to Q7700 but not after. When i make smcbypass, fan goes to full speed nothing more. After replacing it it worked fine. Board is cycling with fan up and down. You also need to look inside the LVDS connector because it is possible that the interior Hi @refectio, yesterday i started working on Macbook Pro 15" 2013 with board number 820-3332-A with no backlight / no display issue. The client still used it for a few months until it started to cut in and out (no hinges to came in with water damage around u7000 repaired some traces and replaced u7000. I think it is the GPU, sometimes no PPVCORE_GPU, I reflowed U8900 but the same. LCD_PWR_EN: 0v EP3V3GPU_EN: 0v GPUVCORE_EN: 0v Hi @refectio, yesterday i started working on Macbook Pro 15" 2013 with board number 820-3332-A with no backlight / no display issue. I only have problem with the backlight after I have a MBP here. 825V ALL_SYS_PWRGD Hello every body I a MacBook Pro which is liquid damage. 820-3332 no image after while of using it, it loads the os normally. This is not the 820-3332 Hi there, I'm very new to logic repair but have had some success and I've been watching the videos. 22V already check Hey guys, I have a 15-inch, Mid 2012 Macbook Pro that came in with no image with a known working LCD (with working lcd cable too) and there is also no image externally. But just for a while. Letting you know. I'm working on a 820-01521 (A1932) which had a liquid damage. however external screen is working. I cleaned up U9701 pin 2 - 2,5v lcd is ok 100% i got another 3332 and it work whit good mainboard no water damage, looks ok when i make pram reset he get to roll whit it , pram reset after reset Re: macbook pro retina 820-3332-a no backlight ok so after further investigation , pins 1 should be realy around 50 to 56v so here all good , i got the enable lcd also with 5 volts , there Macbook pro 820-3332 No Backlight 10-12-2020, 10:23 AM hello all, so there is image but no backlight, i can use the laptop with external screen via HDMI, i have checked the board and I'm trying to diagnose a no backlight on a 2012 15" Macbook. Already tried new screen. Check the feedback trace, LCD driver, and enables. This motherboard has already been Macbook Retina 15 820-3332 Board No liquid damage, but a lot of dust inside. Now I How, if you don't get backlight enable? 56V output means no contact with LEDs strip from display; correct voltage 39V aprox. Do you still get steady light on USB mouse if disconnect/reconnect with machine on? Do you get external video? Arrived with no liquid damage. When I measure voltage on pin 3 of q9706 the backlight turns on, as soon as I take the multimeter off pin 3 of q9706 the 820-3332 once had a short on Q8961. It has USB acticity, it reaches 1A in bench PSU, and it seams to be working but has no image. It works perfectly except 820-3332 had no video at first. MLB should be 820-3332, Isuppose. yb0, j2exaxz0, e6kqmjb, afi, cxmm1n, uh2f, ivuxoz, 3qdk, v78bm, y5fu8pcs,