I've an Apple iMac 2019 model A2115. Sometimes works fine, but many time doesn't works, the fan spinning but no chime e no video output.
The diagnostic Led (3+2) are the same: 1-off 2-on 3-on 4 off 5 on
Any idea?
Ty ...
Eleways
Senior Member
Last Activity: 03-28-2025, 02:48 AM
Joined: 10-29-2014
Location: Pisa
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Imac 27" A2115
Hi there,
I've an Apple iMac 2019 model A2115. Sometimes works fine, but many time doesn't works, the fan spinning but no chime e no video output.
The diagnostic Led (3+2) are the same: 1-off 2-on 3-on 4 off 5 on
Any idea?
Ty ... -
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Diode GO C 40
Hi
I need to replace a defective diode in a power supply. the diode's code is GOC 30 or GOC 40.
I haven't found any details about this diode, anyone can help me on this? the code is first line GO or G0, second line C third line 40
Thanks for your help -
Macbook pro A1708 - replace bios
Hi there.
I've bought some motherboard A1708 with replaced bios. These motherboards doesn't works, or works very slow.
I need to fix these, but i don't know how. I've tried to ask here about a good Bios, but no one works.
Can you tell me the way to modify the bios as to work on this board? I don't have the original bios and i don't have the serial number of the board.
Many thanks for your help
lukeLeave a comment:
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Apple A1398 2015 - Audio problem
Hi there.
I've got an Apple Macbook pro 15" Late 2015 with a strange audio problem.
The Left speaker work fine, the right speaker have muffled sound (it's seems only the bass work). If i ear the music the sounds it's good, but if i balance the sound left i ear very clean, if i balance right the sound it's bass and muffled.
I change the speaker, but not solved. I replaced amplifier, codec and i check all the passive filter. Problem not solved.
I've the some trouble with another 15", A1707 late 2016.
Anyone have... -
Re: Apple A1708 820-00875-a Bios damaged
Hi, let me know if the attached bios is ok and, if yes please, upgrade.
Best regards, Eltek Italy...Leave a comment:
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Apple A1708 820-00875-a Bios damaged
Hi there
I've a MacBook A1708 2016, motherboard 820-00875-a. The Bios it's damaged. I've try with other bios from same motherboard but doesn't work.
The Macbook works, but need about 1 minute to start.
Can You help me on this? Why 3 different bios from the same model of motherboard doesn't work?
Thanks for your help.
Luca -
Apple A1278 Fan spinning to max
Hi
I've an A1278 macbook with a 820-3115 motherboard. It's working fine but the fan start to spinning to max after few second from turn on.
This problem start after we try to use the original keyboard of the customer. I discover after that this keyboard was damaged by liquid.
Before this, the fan working fine.
Any idea?
thanks for your help -
Apple A1278 Fan spinning to max
Hi
I've an A1278 macbook with a 820-3115 motherboard. It's working fine but the fan start to spinning to max after few second from turn on.
This problem start after we try to use the original keyboard of the customer. I discover after that this keyboard was damaged by liquid.
Before this, the fan working fine.
Any idea?
thanks for your help -
iMac 27" 2011 with Monterey
Hi
I knew that it's possible to install Os Monterey on iMac 27" 2011.
The way it's to change to video card original and use an Nvidia Quadro like K1000 , k3100 etc. and by using a special patch.
I suppose that we need to change the firmware or something else as to use this card on a Mac.
Anyone have information regarding this?
Many thanks!
Luke MacWalker! -
Re: Apple Macbook A1707 Hard disk
many thanks!...Leave a comment:
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Re: Apple Macbook A1707 Hard disk
A1707 it's a Macbook without Hard disk SSD, the hard disk it's a BGA chip on the motherboard.
So can i exchange this chip with the same or with another one?Leave a comment:
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Apple Macbook A1707 Hard disk
Hi
I've an Apple macbook A1707 with Hdd defect.
This product don't work with a normal Hard disk, but the hard disk it's a BGA component on the logic board.
My question is:
Can i exchange the hard disk, by desolder the bga Hard disk and replacing this?
Can i replace with a different one (es 500 gb instead of 250 gb)
This Macbook has T1 security check.
Thanks and best regards
Luca -
How to use TL866
Hi Guys
We have a programmer TL866 IIPlus.
We need to use whit a flash S29jl032h90bai320. This flash it's a 48 pin, so we can use by adaptor. The problem is that the programmer socket it's a 40 pin.
This flash it's inside the list of available programmable device for the TL866.
The question is...how to use this flash with this programmer?
Thanks for your help!!!
Luke! -
Datalogic Memor DL 800
Hi guys
I've a Datalogic DL-Memor 800-904-416.
It won't start. Only a red led at the right side on. It's logic board problem (I've try to replace power board and other peripherals)
Anyone have experience on this device?
Thanks and best regard.
Luca -
Citroen Contro unit.
Hi
I need to replace a control unit on a Citroen C4. So I've got a new one control unit but doesn't work due the immobilizer code.
I've open both central unit but I've found a Flash Eprom M49F4000 and a 93c56 eeprom.
I don't know how replace to fix immobilizer problem.
Anyone can help me?
Thanks!
Luca -
Apple iMac A1418 Late 2013 - Fan run at max.
Hi there
An iMac A1418 late 2013 (but same problem on an A1419 too).
It works but very slow. Fan start to run after few second you turn on the iMac.
I've spoke with a friend in Apple, and he tell me about a sensor defective, but they usually replace the motherboard to fix the problem.
This iMac have no sensor (only one on the display), so I presume he means about a sensor on the motherboard.
Anyone have same problem? any idea about to solve?
Thanks and best regards.
Luke -
Re: Macbook Pro Retina 13” 820-3476-A (A1502) - missing PM_SLP_S4_L
Hi
I've a similar problem, my A1502 it's dead too, but the led does't light on.
These are my measurements:
PPBUS_G3H 12.55V
PP3V42_G3 3.4V
PPVRTC_G3H 3.4V
PP5V_S5 0V
PP5V_S0 0.39V
PP5V_S3 0.15V
PP3V3_S5 3.4V
PP3V3_S4 0V
PP3V3_S3 0V
PP3V3_S0 0V
S4_PWR_EN 0V
SMC_PM_G2_EN 0 V
S5_PWR_EN 0 V
SMC_ADAPTER_EN 0 V
PM_RSMRST_L 0 V
PP3V3_SUS 0 V
...Leave a comment:
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Liquid Flux no clean
Hi
I've just finish my favorite Flux, I used Loctite MF210.
So my supplier is closed and I cannot find it in other place.
I ask you a suggestion to find a better Flux to use for rework.
I need a liquid flux no clean, no water based.
I use it for rework/reflow on laptop motherboard by use an infrared machine (Achi Pro).
I've got another good flux, a Solder Chemistry PRo, it's good but I need to clean it after rework, and in case of reflow the Bga don't move at temperature.
Can you help me on this?... -
820-00165 - Battery problem
Hi
I've a problem on a MacBook Air 13" 2014, motherboard 820-00165-a.
It works fine but don't detect the battery.
It works with battery without power supply plugged but the system don't detect battery (the battery icon had a X inside). If I connect power the magsafe led start green and become amber. the battery will charge and work.
We try to replace ISL and check resistor around, without success.
Any suggestion?
Thanks and best regards
Luke
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