⟐ Commented December 28, 2021 at 8:19 MST

⟐ Commented April 23, 2023 at 2:51 MST

My speakers are disabled (except for the chime sound when booting), the sound pref panel only allows me to select 'Digital Out' for sound output, and a red light shines out of the jack. Headphones work when I plug 'em in.

I've found other discussions out there about this (such as: http://discussions.apple.com/thread.jspa...), but so far I haven't had much luck with suggestions found there.

Any ideas?

Thanks!

Jeff

⟐ Commented April 04, 2022 at 23:14 MST

When it goes black, I can use the F1 and F2 keys but have to keep it on a very low setting—and sometimes it won't work for long.

When it goes black, if I were to shine a light on the screen, I can see everything on the desktop!

HELPPPPP MEEEEE!!! Could it be something, besides a screen replacement that I can try myself? (A screen replacement will cost an arm and a leg.) I'm really aggravated by the whole thing since the timing is terrible.

The last 4 digits of my serial number are 70PO.

⟐ Answer edited November 30, 2019 at 20:53 MST

⟐ Commented July 26, 2023 at 23:26 MST

Serial No. W8823UFR0P1

2.4 /2X1G/160/8D-DL:WHITE

EMC No: 2242

How can I fix this and how much will it cost? Also, I have been thinking about selling it. How much can I get for it if it has this damage and minor scratches and wear. Where can I sell it for the best price?

⟐ Commented July 06, 2021 at 0:59 MST

⟐ Commented November 24, 2021 at 3:02 MST

⟐ Answered June 06, 2024 at 5:49 MST

The noise seems unrelated to which / how many programs are running--sometimes it begins when I open up my computer with no programs open and continues until I shut the lid, whereas other times it will start seemingly randomly as I'm working in Word or browsing online. I don't have anything in the CD drive.

I would say I hear some kind of unusual noise of varying loudness coming from my laptop about 25% of the time I'm using it, now. At its worst, it can be heard even when I'm playing music over my laptop speakers at full volume. It sounds like it's coming out of the back of the computer, and I'm pretty sure it's not the hard drive.

(I'm not sure whether or not it's relevant, but occasionally my laptop fails to pick up any wireless signal--even in my apartment, where I know there to be about 15 networks in range.)

So, here's my question: What could make this kind of noise? Why might it be so intermittent? Is there anything I can do to fix it?

⟐ Answer deleted February 06, 2012 at 23:08 MST

Here's my problem,

The Macbook is functioning fine, but the battery shows a black cross. I can't boot without the power adapter connected but once started, even right in the beginning, i can disconnect the power and it boots up fine. The magsave connector is green.

Ive done the following step,

Reset the pram and smc even disconnected the pram cel for a wile.

Tested the battery and adapter on my other macbook (same model) And finally swapped both battery cable and mac connector with the working macbook. None solved the problem.

So i'm thinking its the logic board. and i would think this is reparable if i know witch component is the most common to fail.

Dos anyone have an suggestion?

Best regards,

Wijnand van der Linden

(i hope its readable english, is not my first language (dutch)

⟐ Answered December 14, 2012 at 4:38 MST

Url for the item i bought..http://cgi.ebay.com/ORIGINAL-NEW-Apple-M...

⟐ Answered November 07, 2020 at 4:59 MST

⟐ Commented April 24, 2020 at 22:01 MST

How can I distinguish between an inverter or inverter cable problem and an LCD cable problem.

It must be backlight because I can see that the screen is working when an external light shines on it.

I am prepared to fix this myself but do not want to replace LCD cable when it's an inverter or inverter cable problem and of course vice versa.

Curiously sometimes I can open up the lid to upright after sleep and the display is normal but then it cuts out and I have to find the smaller angle of opening to keep the backlight on.

⟐ Answered November 27, 2017 at 7:25 MST

P.S. a couple of days i realize that the screw right in the middle of the under case is missing, i don't know if that might have make the RAM get loose so when its move the RAM moves, therefore freezes

⟐ Commented October 15, 2016 at 5:39 MST

Thanks for looking.

-Jim

⟐ Commented May 08, 2015 at 18:42 MST

⟐ Commented June 20, 2024 at 12:27 MST

So I take out the mother board for a look, find that there are two chips burned, I think they are SMT. That things fall apart when I tried to remove them. later I put the charger on, nothing change. Same green light, no sign of turn on.

It has "157" on one of the burned SMT, an other one’s information had burned out completely. I find anther smt on the other side(the yellow one), which look like the same(maybe), I have google the words on it, nothing useful is founded.

Do anyone know the spec of the smt and what do they do? I hope to replace them and see would that fix the problem. The mother board is 820-1889-A.

I know this is an old computer, it might not worth a big effort to fix it, but I do not want it become e-waste without a try.

Thank you for reading this question. Good luck, stay heathy and stay happy.

Update (12/18/2021)

I have took some better pictures of the motherboard. All the marking should be readable, hope this might help. The red line are where the capacitors should be, I have removed them with a hot gun. Thank you.

Update (12/19/2021)

After more investigation. I have found the Schematics of the 820-1889-A. From the words on the board I look around U7600, and found that there are 4 poly-cased capacitors around. So, I have measured the voltage of the feet of the 4 capacitors , the 2 black capacitors right below the U7600, give about a 12V and the burned two capacitors give around 3~4V. From the Schematics I suspect those might be the C7652 and C7692 (both 150uf 6.3v) as the voltage which received shound not exceed which they can handle. Those route of C7652 and C7692 seem coming form the SMC, that all I can tell. No Idea why they all burned out. I will orde the parts and see what will get. I have no high hope of geting the computer to work, but that is what I will try. Thank you for all of you helping out. I will update what happen after I have done the replacement.

After more investigation. I have found the Schematics of the 820-1889-A. From the words on the board I look around U7600, and found that there are 4 poly-cased capacitors around. So, I have measured the voltage of the feet of the 4 capacitors , the 2 black capacitors right below the U7600, give about a 12V and the burned two capacitors give around 3~4V. From the Schematics I suspect those might be the C7652 and C7692 (both 150uf 6.3v) as the voltage which received shound not exceed which they can handle. Those route of C7652 and C7692 seem coming form the SMC, that all I can tell. No Idea why they all burned out. I will orde the parts and see what will get. I have no high hope of geting the computer to work, but that is what I will try. Thank you for all of you helping out. I will update what happen after I have the done replacement.

Update (12/22/2021)

After the change of the burnt capacitor, I finally get the computer to work. I put an cloudready OS(chrome OS) on it, and now it is good to web browsing and watching some videos on youtube. I think I will find more use of it in the furture. Thank you for your help.

⟐ Answer accepted December 24, 2021 at 2:25 MST

<history>

Yesterday, The button was clicking when I was just typing. I don't have tap-to-click enabled, and I definitely was not pressing the button. The most common causes of this problem appear to be spill damage and a swelling battery. I've never spilled anything on this computer and my battery does not appear to be swelling.

The button seems to be back to "normal" today, but this made me very concerned that I would either have to get a new top case or disable my trackpad (I would hate to carry a mouse around with me everywhere).

</history>

So even though my trackpad is working "fine" now, it may have problems again in the near future. What maintenance can I do to keep my flagship machine in usable condition?

Is there a way to remove the button and remove dust from that area? Since this computer is in its 5th year of use, I'd imagine there's some amount of dust in it. Either way, I'd like to have a look at the components that make it up - maybe some spring is no longer working properly or something.

I'm familiar with replacing the upper case, which I did for my sister's MacBook, so I'm mainly wondering which side to attack this problem from.

Any and all information you have on this subject is helpful! Thanks!

⟐ Commented March 24, 2012 at 12:09 MST

⟐ Commented October 03, 2010 at 20:40 MST

⟐ Commented August 13, 2021 at 7:48 MST