Ga door naar hoofdinhoud

Repareer je spullen

Recht op reparatie

Onderdelen & Gereedschap

iMac Intel 27" EMC 2309 (Late 2009, Core 2 Duo 3.06 or 3.33 GHz) ID iMac10,1, EMC 2374 (Late 2009, Core i5 2.66 GHz or Core i7 2.8 GHz) ID iMac11,1

489 Vragen Bekijk alle

No booting, S.O.S beeping, black screen

After pushing the start button, my mac gives 9 beeping (S.O.S. signal) the screen is black. No booting, fans are working but the keyboard is frozen.

The diagnostic LEDs:

RAM and display are not connected.

LED1 is lighting

LED2 is lighting after pushing start button.

LED3 and LED4 are not lighting.

What can be the problem? Logical board or graphic card?

thanks for your help

Beantwoord! View the answer Dit probleem heb ik ook

Is dit een goede vraag?

Score 1

Commentaar:

Did anybody this same problem?

door

Voeg een opmerking toe

Essentiële Electronica Toolkit

Kleine toolkit. Grote dromen.

Shop Toolkits

Essentiële
Electronica
Toolkit

Shop Toolkits

3 Antwoorden

Gekozen oplossing

Krisz, looking at the diagnostics code for the LED's:

LED #1

• Indicates that the trickle voltage from the power supply has been detected by the main logic board. This LED will remain ON whenever the iMac is connected to a working AC power source. The LED will remain on even when the computer has been shut down or put to sleep. The LED will turn off only if the AC power source is disconnected or the power supply is faulty.

LED #2

• Indicates that the main logic board has detected proper power from the power supply when the computer is turned on and that logic board voltage regulators are functioning properly. This LED will be ON when the computer is turned on and the power supply is working correctly.

LED #3

• Indicates that the computer and the video card are communicating. This LED will be ON when the computer is communicating properly with the video card. If LEDs 1 and 2 are ON and you heard the startup sound, but LED 3 is OFF, then the video card might be installed incorrectly or need replacement.

LED #4

• Indicates that the computer and the LCD panel are communicating. This LED will be ON when the computer is turned on and video signal is being generated. If the LED is ON and there is no image on the display, then the LCD panel, the LED backlight board, or the cables between might be installed incorrectly or need replacement.

I'd start off with the video card. Hope this helps, good luck.

Was dit antwoord nuttig?

Score 0
Voeg een opmerking toe
Het nuttigste antwoord

oldturkey03, many thanks for your help. i know the code of led's. but i am wondering that somebody has already had this beeping.

when in this openedn condition (without display and RAM's) connetcting AC power source and turning on my computer, there is only one beep continueily and LED1 and LED2 lighting. When i tried this without graphic card there was the same.

Was dit antwoord nuttig?

Score 1

Commentaar:

That does sound right. Once you remove the graphics card (in theory) LED 3 should be off since there is no communication to it.

door

Voeg een opmerking toe

yes, i think the same. but what would mean the s-o-s signal?

Was dit antwoord nuttig?

Score 0
Voeg een opmerking toe

Voeg je antwoord toe

Krisz zal eeuwig dankbaar zijn.
Weergavestatistieken:

Afgelopen 24 uren: 1

Afgelopen 7 dagen: 7

Afgelopen 30 dagen: 19

Altijd: 1,232