Wont boot, flashing sleep light

MacBook Pro 13"
Mid-2010 A1278
Serial: WQ********ATM
When Power Button pressed, it is completely unresponcive except for the sleep light on the front flashes
I have noticed, If it is off the charger and you press power button, it will flash on then off just once.
However, if it is on the charger and you press power button it will flash on and off over and over, even if you then remove charger
Have searched heaps of Articles, they tend to point towards either Battery or RAM....
Battery is fully charged, battery indicator on the side shows its full when pressed.
RAM is fully populated, have removed one stick, tested, reinstalled then removed the other stick, tested, and then used RAM from a known working MBP similar model, all no good.
Have had plenty of experience with these A1278s, but never come across this before!
Thanks in Advance for any help!!

If a SMC reset does not bring life to your MBP, bring it in for service:
http://support.apple.com/kb/ht3964
Ciao.

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G61-327CL wont boot; Flashing power lights

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Hey Tyeillin,
Going by what you said, it seems like there is a graphics card issue with that notebook. Take a look at this document for info: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01443366&cc=us&destPage=document&lc=en&tmp_docn...
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I am an HP employee.
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Do you have upgraded ram in your MBP? I believe that 3 beep signifies that your computer has failed ram tests on both banks of ram.
Some RAM may appear to pass the Power-On-Self-Test (POST) but still cannot be used by the operating system. In this case, the computer will display a gray screen, sound three tones and blink the power LED on the front of the computer three times, pause, and repeat the blinking until the computer is turned off.
The solution to both of these situations is to first re-seat the memory and test the computer again. If the memory fails the POST test again, try memory that has been verified to work correctly on another system (i.e., "known-good") or order new memory from the Apple Store.

Wont boot: I get beeps and flashing sleep light

The PB-T boots to a beeping noise and then the sleep light flashes once: long, then 3 short flashes.
I reseated the RAM and swapped RAM, to no avail.
Wont boot from anything even install disks. Did the PRAM too (which never does anything). Tried the reset switch on the back too. Nothing.
Ideas? I remember the beeps are usually related to RAM. no?
Steve

Hi Steve,
It sounds like you have no good RAM banks, which basically means a new/replacement LB. May not be cost-effective for an older TiBook to replace the LB.
Beep Definitions

Won't boot up - sleep light blinking 3 times

Hi - I have a macbookpro - it suddenly shut down and now won't boot up. When I press the power button I hear the hardrive make a noise " tzz tzz' then nothing - except the sleep light is blinking 3 times a second every few seconds. - I've tried taking out the battery and holding down the power button - taken out the RAM - nothing.
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Broken Charger, Flashing sleep light, etc

Hi this is my first Apple Product and my first issue so I hope you guys can help me with it.
I was given a 15-inch Macbook Pro July 2010 as a gift for making it to college. Last night, after opening up my Macbook from a sleep state with the adapter plugged in, the charger light suddenly goes out. I've tested the charger and determined that it's dead. At the time, I was somewhat peeved but I understand that electronics can be erratic at times and I wasn't in dire need of it. This afternoon however, I forgot that the adapter didn't work so while working on homework it suddenly crashes. I ask my roommate if I could borrow his charger (knowing that it works on my MBP since I tested it the previous night) and when I attempt to turn it on I notice that the charging light is still green, the computer has its sleep light flashing at regular intervals and (I assume) the hard drive starting then dying.
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If a SMC reset does not bring life to your MBP, bring it in for service:
http://support.apple.com/kb/ht3964
Ciao.

Flashing sleep light

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Welcome to Apple Discussions!
The flashing light tells you that you have a RAM problem:
http://support.apple.com/kb/HT2341
Try reseating the RAM and see if that fixes it. If not, you might have to replace your RAM, but since RAM generally has a lifetime warranty, it shouldn't cost you anything.
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I've tried the "reset pram" thing. I've tried taking out the battery. I've moved the RAM chip to the other slot aswell to make sure it was in correctly. I tried holding the power down for 10 seconds and then turning it on again (that usually works) but nothing. When I press the power button I sort of hear a fan come on quietly and the sleep light comes on too, but no boot or nothing.
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SMC Reset...
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2.Disconnect the AC Adapter and remove the computer's battery.
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The 'blink' code indicates a memory error.
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L305D-S5893 Randomly wont boot after sleep

hello,
I have been having this problem for a while but when I close my computer for the night and try to turn it on in the morning sometimes it will start others it won’t. The computer powers up but I don’t hear the HDD spin up. The front LEDs and the DVD drive LED will be lit but the computer is completely unresponsive. I cannot turn it off through the power button, I have to take out the battery, power cord, and completely restart the computer. Any help would be much appreciated since I have already sent it back to Toshiba 3 times and I still have the same problem.

Hi, BJZTX -
Try resetting the PMU -
Article #95037 - G4 (AGP) - Resetting PMU
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Try rolling the battery in its holder, to ensure good contact.
Check to make sure all internal cables are well-seated - that usually entails breaking and making the connections (do that with the machine powered off and unplugged).
Some dust can be conductive - make sure no dust clumps got blown into the pins for RAM, CPU, PCI sockets, etc.
Ditto the jumper pin blocks on the drives. While there, make sure no jumpers got dislodged or blown off.

Sleeping light & keyboad lights failure

Dear all,
I read the posts archived in these forums on the following issue but as there was no real guidance coming forward I thought to restate the issue I'm facing in case there is fresh knowledge on it.
A couple of weeks ago, the sleep light on my powerbook G4 started to come on all the time. I didn't noticed it until tonight, but it seems that when this occurs the backlit keyboard is also non-functional. This doesn't happen all the time, but now most of the time.
A friend told me that this was an indication of an issue with the USB ports, which would be grave because they are linked directly to the logic board.
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Can anyone give any practical advice on this issue? I cannot afford to lose my logic board, especially given that I live in Egypt where a new logic board would be hard to find and may not be able to be fitted.
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Hey All,
I finally decided to check here, as none of the fixes I attempted appeared to be working.
If it is an L-Board problem, them I'm in deep doo.
I'm currently in Panama, and thought that it might be a problem with some sort of variance in the power cycle here, as my first couple of days here, the PowerBook refused to charge fully.
It would keep at a constant level, and only draw power when it dropped below.
None of the various locations I tried provided relief, until recently, and now P]power's fine and at 100%.
Except I noticed the flashing 'sleep light' last night, tried checking around.
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There's a MacStore (authorized reseller type), I'll have to try them and see if they can do anything, as my AC contract is still valid.
Crikey, this *****.

Wont boot, flashing sleep light

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