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現在のバージョン作成者: originalmachead and oldturkey03 (投票の詳細) ,

タイトル:

No chime, no startup, no screen but fans and power-LED is on

テキスト:

I have a nice iMac G5 (iSight) on my desk but it doesn't run...

The system does the following:

After pluging in the power-cord diagnostic LED 1 lights on.

After switching it on the following occurs:

# NO (!!!) start-chime
# Diagnostic LED 3 flashes very shortly (10ms)
# Diagnostic LED 2 flashes very shortly after LED 3
# the right fan runs normal
# the Power-LED (which is see through the case) is on
# the optical drive goes in begin state
# the HD sprins up and goes in begin state

The system''' turns exactly after 1 minute''' all fans in full blow mode...

_______________

'''What did I have checked?'''

1. the main powersupply:

- 12V is OK and stable

- 3,3V is OK and stable

2. the other voltages are produced on a combo-board, with the inverter for teh TFT.

I measured the following voltages and they correspond to the printed voltages on the mainboard:

* 3,3V all

* 3,3V run

* 5V all

* 5V run

* 12V all

* 12V run

But there are two lines in the plug on position 1 and 8 (white and gray cables) there is no voltage and they are not GND!

'''Does anyone can say, what these two cables to have been supposed?'''

I have numbered the cables of the plug in this way:

_________________________

| 01  | 02  | 03  | 04  | 05  | 06  | 07  |

_________________________

| 08  |  09  | 10   |  11  |  12   |  13   |  14   |

_________________________

When you lay down the open iMac with the top towards you and take a look to the cables then the white and the gray cable should be at the left side...

Btw. I've just changed all the ELCOs on the mainboard with Low-ESR-Elcos, but it is the same problem with the iMac!!!

Best regards

Georg

デバイス:

iMac G5 17" Model A1144

ステータス:

open

承認済み回答:

41179

編集者: GeorgG ,

タイトル:

No chime, no startup, no screen but fans and power-LED is on

テキスト:

I have a nice iMac G5 (iSight) on my desk but it doesn't run...

The system does the following:

After pluging in the power-cord diagnostic LED 1 lights on.

After switching it on the following occurs:

# NO (!!!) start-chime
# Diagnostic LED 3 flashes very shortly (10ms)
# Diagnostic LED 2 flashes very shortly after LED 3
# the right fan runs normal
# the Power-LED (which is see through the case) is on
# the optical drive goes in begin state
# the HD sprins up and goes in begin state

The system''' turns exactly after 1 minute''' all fans in full blow mode...

_______________

'''What did I have checked?'''

1. the main powersupply:

- 12V is OK and stable

- 3,3V is OK and stable

2. the other voltages are produced on a combo-board, with the inverter for teh TFT.

I measured the following voltages and they correspond to the printed voltages on the mainboard:

* 3,3V all

* 3,3V run

* 5V all

* 5V run

* 12V all

* 12V run

But there are two lines in the plug on position 1 and 8 (white and gray cables) there is no voltage and they are not GND!

'''Does anyone can say, what these two cables to have been supposed?'''

I have numbered the cables of the plug in this way:

_________________________

| 01  | 02  | 03  | 04  | 05  | 06  | 07  |

_________________________

| 08  |  09  | 10   |  11  |  12   |  13   |  14   |

_________________________

When you lay down the open iMac with the top towards you and take a look to the cables then the white and the gray cable should be at the left side...

Btw. I've just changed all the ELCOs on the mainboard with Low-ESR-Elcos, but it is the same problem with the iMac!!!

Best regards

Georg

デバイス:

iMac G5 17" Model A1144

ステータス:

open

承認済み回答:

41179

編集者: GeorgG ,

タイトル:

No chime, no startup, no screen but fans and power-LED is on

テキスト:

I have a nice iMac G5 (iSight) on my desk but it doesn't run...

The system does the following:

After pluging in the power-cord diagnostic LED 1 lights on.

After switching it on the following occurs:

# NO (!!!) start-chime
# Diagnostic LED 3 flashes very shortly (10ms)
# Diagnostic LED 2 flashes very shortly after LED 3
# the right fan runs normal
# the Power-LED (which is see through the case) is on
# the optical drive goes in begin state
# the HD sprins up and goes in begin state

The system''' turns exactly after 1 minute''' all fans in full blow mode...

_______________

'''What did I have checked?'''

1. the main powersupply:

- 12V is OK and stable

- 3,3V is OK and stable

2. the other voltages are produced on a combo-board, with the inverter for teh TFT.

I measured the following voltages and they correspond to the printed voltages on the mainboard:

* 3,3V all

* 3,3V run

* 5V all

* 5V run

* 12V all

* 12V run

But there are two lines in the plug on position 1 and 8 (white and gray cables) there is no voltage and they are not GND!

'''Does anyone can say, what these two cables to have been supposed?'''

I have numbered the cables of the plug in this way:

_________________________

| 01  | 02  | 03  | 04  | 05  | 06  | 07  |

_________________________

| 08  |  09  | 10   |  11  |  12   |  13   |  14   |

_________________________

When you lay down the open iMac with the top towards you and take a look to the cables then the white and the gray cable should be at the left side...

Btw. I've just changed all the ELCOs on the mainboard with Low-ESR-Elcos, but it is the same problem with the iMac!!!

Best regards

Georg

デバイス:

iMac G5 17" Model A1144

ステータス:

open

承認済み回答:

41179

編集者: mayer ,

タイトル:

No chime, no startup, no screen but fans and power-LED is on

テキスト:

I have a nice iMac G5 (iSight) on my desk but it doesn't run...

The system does the following:

After pluging in the power-cord diagnostic LED 1 lights on.

After switching it on the following occurs:

# NO (!!!) start-chime
# Diagnostic LED 3 flashes very shortly (10ms)
# Diagnostic LED 2 flashes very shortly after LED 3
# the right fan runs normal
# the Power-LED (which is see through the case) is on
# the optical drive goes in begin state
# the HD sprins up and goes in begin state

The system''' turns exactly after 1 minute''' all fans in full blow mode...

_______________

'''What did I have checked?'''

1. the main powersupply:

- 12V is OK and stable

- 3,3V is OK and stable

2. the other voltages are produced on a combo-board, with the inverter for teh TFT.

I measured the following voltages and they correspond to the printed voltages on the mainboard:

* 3,3V all

* 3,3V run

* 5V all

* 5V run

* 12V all

* 12V run

But there are two lines in the plug on position 1 and 8 (white and gray cables) there is no voltage and they are not GND!

'''Does anyone can say, what these two cables to have been supposed?'''

I have numbered the cables of the plug in this way:

_________________________

| 01  | 02  | 03  | 04  | 05  | 06  | 07  |

_________________________

| 08  |  09  | 10   |  11  |  12   |  13   |  14   |

_________________________

When you lay down the open iMac with the top towards you and take a look to the cables then the white and the gray cable should be at the left side...

Btw. I've just changed all the ELCOs on the mainboard with Low-ESR-Elcos, but it is the same problem with the iMac!!!

Best regards

Georg

デバイス:

iMac G5 (iSight)17" Model A1144
iMac G5 (iSight)17" Model A1144

ステータス:

open

オリジナル投稿者: GeorgG ,

タイトル:

No chime, no startup, no screen but fans and power-LED is on

テキスト:

I have a nice iMac G5 (iSight) on my desk but it doesn't run...

The system does the following:

After pluging in the power-cord diagnostic LED 1 lights on.

After switching it on the following occurs:

# NO (!!!) start-chime
# Diagnostic LED 3 flashes very shortly (10ms)
# Diagnostic LED 2 flashes very shortly after LED 3
# the right fan runs normal
# the Power-LED (which is see through the case) is on
# the optical drive goes in begin state
# the HD sprins up and goes in begin state

The system''' turns exactly after 1 minute''' all fans in full blow mode...

_______________

'''What did I have checked?'''

1. the main powersupply:

- 12V is OK and stable

- 3,3V is OK and stable

2. the other voltages are produced on a combo-board, with the inverter for teh TFT.

I measured the following voltages and they correspond to the printed voltages on the mainboard:

* 3,3V all

* 3,3V run

* 5V all

* 5V run

* 12V all

* 12V run

But there are two lines in the plug on position 1 and 8 (white and gray cables) there is no voltage and they are not GND!

'''Does anyone can say, what these two cables to have been supposed?'''

I have numbered the cables of the plug in this way:

_________________________

| 01  | 02  | 03  | 04  | 05  | 06  | 07  |

_________________________

| 08  |  09  | 10   |  11  |  12   |  13   |  14   |

_________________________

When you lay down the open iMac with the top towards you and take a look to the cables then the white and the gray cable should be at the left side...

Btw. I've just changed all the ELCOs on the mainboard with Low-ESR-Elcos, but it is the same problem with the iMac!!!

Best regards

Georg

デバイス:

iMac G5 (iSight)

ステータス:

open