Technical Support DA0ZRTMB6D0 no lights

[laup]

Laptop doesn't display all voltages

I have reprogrammed bios.

When I remove bios chip 3v comes back. With bios chip welded I loose basically all voltages.

See video with bios removed

 

[Hosein Asadolahi]

Laptop doesn't display all voltages

I have reprogrammed bios.

When I remove bios chip 3v comes back. With bios chip welded I loose basically all voltages.

See video with bios removed

at first test with another bios ic and sure place correct .
you must program io ite also .

 

[laup]

i have tested with another Bios winbond chip also

 

[laup]

svod cannot connect to ITE chip
ill try find a donor

 

[laup]

I removed ITE

re welded bios I had 3v on pins.

i rewelded donor ITE chip now i have the short again and no voltage to bios

 

[laup]

SVOD shows ITE busy with all pins ok and new chip, there is something goin on up that side of the board.

I believe the Super IO is connecting to rails that are creating a short?

 

[laup]

Im thinkin of removing ITE and Bios then injecting voltage on pin 1 of bios?

 

[laup]

the pch could be weak link here? customer says it took more and more attempts to turn on, ive lightly bottom reflowed to no avail

 

[Notebook Centro CHILE]

Im thinkin of removing ITE and Bios then injecting voltage on pin 1 of bios?

Don't do that friend!
Check if you have 3V in VCC_RTC.
Indicate which pin of the serial Flash is shorted, if it is WB, indicate the model to review the datasheet and get an idea. Greetings!

 

[Notebook Centro CHILE]

Laptop doesn't display all voltages

I have reprogrammed bios.

When I remove bios chip 3v comes back. With bios chip welded I loose basically all voltages.

See video with bios removed

When you measure one end of the inductor, you don't need to measure the other.
Is it an Acer motherboard ?, indicates more details to look at the schematic.
Or if you have it (the diagram), check what state the ignition is in s5, s4, s3, etc.). From the voltages, I see that there is VCC_RTC and the PCH is working. Perhaps it is a BIOS or EC firmware programming failure. Try to get the motherboard working without having to plug in the power button, sometimes that fails.
Silly, but it has happened to all of us at some time.
Good luck!

 

[laup]

When you measure one end of the inductor, you don't need to measure the other.
Is it an Acer motherboard ?, indicates more details to look at the schematic.
Or if you have it (the diagram), check what state the ignition is in s5, s4, s3, etc.). From the voltages, I see that there is VCC_RTC and the PCH is working. Perhaps it is a BIOS or EC firmware programming failure. Try to get the motherboard working without having to plug in the power button, sometimes that fails.
Silly, but it has happened to all of us at some time.
Good luck!

Hey Mate

yes it s a acer f5-571

the actual board has a power button on the main board, and a secondary through the keyboard

power button on main board has voltage

 

[laup]

When you measure one end of the inductor, you don't need to measure the other.
Is it an Acer motherboard ?, indicates more details to look at the schematic.
Or if you have it (the diagram), check what state the ignition is in s5, s4, s3, etc.). From the voltages, I see that there is VCC_RTC and the PCH is working. Perhaps it is a BIOS or EC firmware programming failure. Try to get the motherboard working without having to plug in the power button, sometimes that fails.
Silly, but it has happened to all of us at some time.
Good luck!

I ave tried 2 bios chips that read and write fine. i have replaced super IO but with original and donor SVOD comes up as busy as the short is interfering with power to the chip

 

[Notebook Centro CHILE]

I ave tried 2 bios chips that read and write fine. i have replaced super IO but with original and donor SVOD comes up as busy as the short is interfering with power to the chip

In your case, I would do the following:
I would check the status of R577, if it is OK, I would replace Y2 (if you can measure the signal before, you can skip the replacement, I mean in the case that you don't have an oscilloscope).
I would also check the status of R528 and D25.
Previously I would isolate the signal in J1, with that I avoid disassembling the ROM (I suppose), and checking the status of C182.
Good luck!

 

[Patrick Ribbsaeter]

I ave tried 2 bios chips that read and write fine. i have replaced super IO but with original and donor SVOD comes up as busy as the short is interfering with power to the chip

can u post the list of voltages and signals you have done so far in numbered order?

 

[laup]

In your case, I would do the following:
I would check the status of R577, if it is OK, I would replace Y2 (if you can measure the signal before, you can skip the replacement, I mean in the case that you don't have an oscilloscope).
I would also check the status of R528 and D25.
Previously I would isolate the signal in J1, with that I avoid disassembling the ROM (I suppose), and checking the status of C182.
Good luck!

thanks for the pointers i will investigate next week when i get back into work

 

[laup]

can u post the list of voltages and signals you have done so far in numbered order?

hey mate

did u watch the video? i did a few on there

 

[Notebook Centro CHILE]

hey mate

did u watch the video? i did a few on there

I saw it, that's why I sent you the photo.