How to fix screen flickering after power on?

Question

MacBook Unibody Model A1278

13インチアルミ製Unibody, 2.0 or 2.4 GHz Core 2 デュオプロセッサモデルです。

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Hama @hama59827

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投稿日: 2014年9月11日

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How to fix screen flickering after power on?

Suddenly my MacBook's screen has started to flicker after power on and after wake up for about a minute. After that, it's fine again.

Sometimes the screen goes blank for a couple of seconds. Then it's just flickering randomly and occasionally showing like horizontal lines.

After a minute or so, everything is back to normal.

It is not the backlight, since I can adjust the brightness using F1 and F2 keys even when the screen goes blank.

Any suggestions how to fix it? Thanks a lot!

EDIT: It looks like it only happens when I power on the MacBook or wake it from sleep after I haven't used it for a while and it is cold. After it has heated up for a minute, it's just fine.

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Hama, what are the last four digits of your computers serial number? this will help us to properly identify your hardware.

oldturkey03 さんによる2014年9月11日

Which serial number do you mean? It's a Macbook5,1, Intel Core 2 Duo, 2GHz, 13 Inch, Unibody, Late 2008, NVIDIA GeForce 9400M 256 MB running Os X 10.9.4.

Hama さんによる2014年9月11日

Has anyone been into the machine? Any work on the LCD or any reason the LDVS cable might have been disconnected?

mayer さんによる2014年9月11日

No, not really. I upgraded it to 8GB RAM and a SSD 6 months ago. But it's working fine since then.

Hama さんによる2014年9月11日

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Hama, what are the last four digits of your computers serial number? this will help us to properly identify your hardware. — oldturkey03
Which serial number do you mean? It's a Macbook5,1, Intel Core 2 Duo, 2GHz, 13 Inch, Unibody, Late 2008, NVIDIA GeForce 9400M 256 MB running Os X 10.9.4. — Hama
Has anyone been into the machine? Any work on the LCD or any reason the LDVS cable might have been disconnected? — mayer
No, not really. I upgraded it to 8GB RAM and a SSD 6 months ago. But it's working fine since then. — Hama

originalmachead @originalmachead 評価: 116.3千 66 68 359 · Answer 1 · 2014-09-12T12:30:58-07:00

originalmachead @originalmachead

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投稿日: 2014年9月12日

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Connect it to an external monitor. If you see the same behavior there it's the GPU/VGC or logic board. If you don't it has to be in the internal display chain... You're referencing 30 different machines in your ID.

Help us help you. The more complete the description of your problem is (what MB you're using - there are many versions, what OS you're using -there's a lot of those too {Mavericks has a lot of reported sleep/wake issues} ), the more assistance we can provide, and, the sooner we can provide it..

If this answer is acceptable please remember to return and mark it.

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gfaminger @gfaminger 評価: 1 · Answer 2 · 2016-05-04T05:52:02-07:00

Hello,

I have used my MacBook Pro Late 2011 A1278 OS 10.9.5 for five years and have had no problem. I always make it suspend using DeepSleep third part software. Last weekend I have updated my hard drive to a SSD Ultra II Sandisk 480Gb using the disk utility to clone my original drive.

Everything went fine, expect that Office 2011 ask for the license again, and the Mac was taking to long to boot. Well I have re-entered the license and discovered that I need to set again the booting disk on OS preferences.

Both problems were solved, and now I boot in 20s, before was 2-3min.

But yesterday I have used my Mac up to battery complete discharge and the system enter in suspend mode. I have waited 5 hours and before go to sleep I let the battery charging.

Well today it wake from suspend mode but starting flickering the screens and also blanking it in a random manner. The system was there because it answer my key press but I was navigating complete blind some seconds.

After 2 minutes doing this I decided restart the machine by asking OS to restart.

After restart everything went fine again for hours.

What could be the problem? OS Mavericks is have not been fully tested with SSD drivers? Sandisk drive is not compatible?

I do level component repairs to notebook motherboards and can assure there is no BGA, flat cable or LCD problem on my Mac.

Very strange.