robertwistrela, Austria? Dessert? Remember that on Apple logic boards there is no silkscreen text on final production logic boards. Any photos shown with test
points are from pre-production units and are solely for reference. Anyhow, try to start off with some of the things Apple suggest in their trouble shooting section:"
No Power / Dead Unit
• No power
• No image
• No startup chime
• No fan or hard drive spin
• No reset sound from optical drive
• No sleep LED activity
• No light if Caps Lock pressed
1. Verify AC power presence with MagSafe LED indicating on or charge state.
2. Verify battery status as being partly charged, charging with AC power.
3. Reset SMC.
4. Refer to Deep Dive table for battery diagnostic testing.
1. Isolate peripherals as cause.Disconnect all peripherals and external devices and verify unit starts.
Suspect peripherals as cause.
Reconnect each one at a time,verifying unit operation as
external device is reinstalled.
Go to step 2
2. Reset SMC, and verify unit starts. (Alternative hardware SMC reset can be forced by shorting R5001 pads on logic board or removing all system power for 1 minute.) Can
system start up after SMC reset?
Corrupt SMC state preventing power on. Issue resolved with SMC reset.
Go to step 3
3. Will system power up with battery only? Check battery level LED indicator for status of battery charge or battery use error. Inspect battery connector for burn marks or
damaged pins if substituting a known-good battery to verify starting on battery.
System can start up from known-good battery -- customer battery possibly at fault or needs to be charged.
Continue to verify customer battery then AC adapter use and battery charging. Go to step 4.
System will not power using known-good battery only. Go to step 5
4. Customer battery may be run down, or not recognized.
Verify customer battery in a known-good system is recognized and accepting a charge. Confirm customer battery is not consumed nor defective.
Battery is recognized,charging and health is good.
Return to test unit with customer battery and AC adapter power. Go to step 6.
Replace customer battery for not charging or not recognized. Customer to purchase a replacement battery if consumed.
5. Inspect battery cable connection at logic board and reseat if necessary. Replace cable if found damage or burned. Can the system power on from a charged battery with battery cable inspections or replacement?
Battery power restored, return to test unit with customer battery and AC adapter power. Go to step 6.
Logic board is expected to power on with battery only.
Inspect and test power on key. Go to step 10.
6. Inspect MagSafe power adapter. Verify AC adapter is correct wattage, compatible with product and works on known-good computer.
Power adapter is good, go to step 7
Release stuck pin or replace adapter due to wire damage, not working or burned pins
7. Inspect MagSafe port on computer for physical damage, debris or metal fragments attracted to magnetic connector. Is MagSafe connector clean and free from defects?
Go to step 8
Clean port assembly. Replace MagSafe board if necessary.
8. Verify adapter status LED turns on green then orange indicating power and battery charge in progress. A green LED can indicate a full battery, removal of battery or battery not recognized.
System starts and has power. MagSafe LED indicates power is flowing to logic board. Verify customer battery will also charge. Review battery health to ensure customer
AC power is down or battery is not charging. Go to step 9
9. Verify power from adapter is present on logic board.
Remove system battery, use AC power only. Reseat or test known-good MagSafe cable to achieve power for logic board.
Logic board has power adapter energy to start system. MagSafe cable reseat or replacement resolved issue.
If still no system power on indications, go to step 10
AC adapter power not going to logic board power supplies. Replace logic board.
10. Test and inspect Top Case Power Button. Stuck or open power on key or keyboard disconnect can disable the power on of system. If button does not work, locate pads R5015 on logic board just to right of IR/sleep cable. Short pads to power up logic board. If power on key is stuck, keyboard cable must be disconnected for R5015 to work. Does system power on? (Reconnect keyboard cable to confirm bad or intermittent connections.)
Power on key works fine, issue resolved. Power on key works when keyboard cable is reseated. Power on key appears to be stuck, had to remove keyboard cable to power on. Replace top case for stuck power on key
No logic board power on when shorting R5015 pads.
Replace logic board.