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mauda replied to HT-R590 No Sound

in Troubleshooting Audio Equipment

05-20-2024, 05:05 AM
1. Turn ON the receiver
2. On the receiver press the DISPLAY button and keep it pressed
3. On the receiver press the ON/STANDBY button
You will see the firmware version

Next
4. Release the DISPLAY button
5. On the receiver press the TONE + or - button to cycle between the DSP firmware, Main firmware and Loader versions (if present)

The firmwares for my HT-R390 look like this:
M:1.04/1131ALP --> Main firmware
D:?.??/???????? --> DSP firmware
O: 1.00/11107AL

To get out of the firmware menu press STANDBY...

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mauda replied to HT-R590 No Sound

in Troubleshooting Audio Equipment

05-20-2024, 04:56 AM
Hi, I have the same problem = firmware for DSP shows version D:?.?? /????????. How did you manage to solve the problem?

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mauda replied to some additional about it8586e marked lenovo chip programming errors

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-06-2024, 12:44 AM
I have the same problem with RT809H and IT8586E chip.

Online programming in the motherboard using the flex cable does not work.

Offline reading of the chip in the auxiliary PCB works, but as soon as I write to the chip, it stops being readable.

The RT809H really can't work properly with these chips.
But I have not yet tried to put the chip written in this way back on the motherboard, if it will work.

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mauda replied to ACER NITRO AN517-51 BIOS and EC

in BIOS Requests ONLY!

07-11-2023, 05:54 AM
Re: ACER NITRO AN517-51 BIOS and EC

I am having the same problem now = no Vcore rail, only VCC_SA. Did you find the solution?...

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mauda started a topic Sony TV model KD-65XE7005 - only Sony logo for 3 seconds

in Troubleshooting TVs and Video Sources

05-21-2023, 11:56 PM
Sony TV model KD-65XE7005 - only Sony logo for 3 seconds

I'm currently working on repairing a malfunctioning Sony TV model KD-65XE7005 with the mainboard 1-981-926-21. I would appreciate your assistance with this issue.

Upon powering on the TV, the Sony logo appears for approximately 3 seconds, after which the backlight remains lit, the screen remains black, and nothing else happens. The TV consumes around 55W initially and then drops to 35W. The indicator LED remains solid white. It doesn't respond to the remote control. When attempting to update the TV using a USB dongle, the dongle briefly flashes but nothing else happens.
...

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mauda replied to Acer Aspire E5-575 Bios

in BIOS Requests ONLY!

08-02-2022, 04:32 AM
Re: Acer Aspire E5-575 Bios

How is it possible, that your post topic is "Re: Acer Aspire TRAVELMATE P259-MG"
and it is the 3rd page of the topic " Re: Acer Aspire E5-575 Bios"?

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mauda replied to Acer Aspire E5-575 Bios

in BIOS Requests ONLY!

03-30-2021, 10:09 AM
Re: Acer Aspire E5-575 Bios

I found out the correct programmer settings and now I can read the contents of the EC chip. I backed it up.

But when I try to write to the EC any other content, I get an error. I also tried the backup file.
Where can the problem be?...

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mauda replied to Acer Aspire E5-575 Bios

in BIOS Requests ONLY!

03-30-2021, 09:59 AM
Re: Acer Aspire E5-575 Bios

Wow, thank you very much. I understand it well.

I should write the full BIN to the 8pin EEPROM chip
and the extracted 128kB BIN to the 128pin EC chip.
Am I right?...

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mauda replied to Acer Aspire E5-575 Bios

in BIOS Requests ONLY!

03-29-2021, 03:17 AM
Re: Acer Aspire E5-575 Bios

Hello, I bought RT809H programmer.
Can you tell me, please, how can I extract 128kB file for EC from the big 8MB BIN file?...

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mauda replied to Lenovo G50-30 (LA-B102P) no POST when power on

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-04-2021, 11:34 AM
Re: Lenovo G50-30 (LA-B102P) no POST when power on

I do not get 3V on PG pins of PU601/701 on another mb.
The result is the same.

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mauda replied to Lenovo G50-30 (LA-B102P) no POST when power on

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-02-2021, 10:36 AM
Re: Lenovo G50-30 (LA-B102P) no POST when power on

I checked the voltages on the PG pins PU601 and PU701 and they are really low. But the pull-up resistors PR601 and PR704 are missing on the motherboard, see pictures.

I checked the other same motherboard and it doesn't have these resistors either.

What does it mean?...

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mauda replied to Lenovo G50-30 no POST on powerup

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-02-2021, 01:32 AM
Re: Lenovo G50-30 no POST on powerup

OK, I started a new thread here [url]https://www.badcaps.net/forum/showthread.php?p=1020481[/url].Re: Lenovo G50-30 no POST on powerup...1020481[/url].Re: Lenovo G50-30 no POST on powerup

OK, I started a new thread here [url]https://www.badcaps.net/forum/showthread.php?p=1020481[/url].

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mauda started a topic Lenovo G50-30 (LA-B102P) no POST when power on

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-02-2021, 01:26 AM
Lenovo G50-30 (LA-B102P) no POST when power on

Hello, I have a problem with a Lenovo G50-30, motherboard LA-B102P Rev: 1.0, ZIWBO/B1/E0, 2014-06-12

Motherboard powers on (power LED is OK), but no POST, no video (internal or external), no beep, no Caps lock LED indication, nothing.
It is not a "no backlight" scenario - there is nothing on the screen.
Pressing the power button for several seconds turns the motherboard off. So at least that logic is working.

I tried known good compatible DDR3L RAM
All power rails seem to be OK:

PL_coil = stand_by voltage, power_on voltage
...

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Last edited by mauda; 02-02-2021, 01:52 AM.
mauda replied to Lenovo G50-30 no POST on powerup

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-01-2021, 12:03 PM
Re: Lenovo G50-30 no POST on powerup

Omg, I am very sorry.

I have a different motherboard:
ZIWBO/B1/E0
LA-B102P Rev: 1.0
2014-06-12

Should I start another thread on this forum?...

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mauda replied to Lenovo G50-30 no POST on powerup

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-01-2021, 03:50 AM
Re: Lenovo G50-30 no POST on powerup

Can you please explain to me why the PU402 pin2 is not connected anywhere in the diagram?...

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mauda replied to Lenovo G50-30 no POST on powerup

in Troubleshooting Laptops, Tablets, and Mobile Devices

01-31-2021, 10:21 AM
Re: Lenovo G50-30 no POST on powerup

I also tried to measure some KBC pins (ENE KB9012QF A4)....

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mauda replied to Lenovo G50-30 no POST on powerup

in Troubleshooting Laptops, Tablets, and Mobile Devices

01-31-2021, 10:11 AM
Re: Lenovo G50-30 no POST on powerup

PG signals (coil>controller,PGpin = voltage):
PL402>PU401,pin2 = 2.8V
PL404>PU402,pin2 = 0.2V
PL502>PU501,pin10 = 1.37V when power_on
PL601>PU601,pin5 = 0.57V
PL603>PU602,pin2 = 3.3V
PL701>PU701,pin5 = 0.67V when power_on

PL902+PL903>PU901:
- pin8 = 5V
- pin15 = 3.3V when power_on
- pin22 = 5V
- pin27 = 3.3V when power_on

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mauda replied to Lenovo G50-30 no POST on powerup

in Troubleshooting Laptops, Tablets, and Mobile Devices

01-26-2021, 12:56 AM
Re: Lenovo G50-30 no POST on powerup

Here are my measurements:

PL_coil = stand_by voltage, power_on voltage
===========================
PL301 = 20.4V, 20.4V
PL302 = 2.74V, 2.74V (without battery)
PL402 = 3.38V, 3.38V
PL404 = 5.1V, 5.1V
PL502 = 0V, 1.37V
PL601 = 1.8V, 1.8V
PL603 = 0V, 1V
PL701 = 0V, 1.06V
PL902 = 0V, 0.9V
PL903 = 0V, 0.78V

Voltages on:
EEPROM 1st pin = 1.8V
ETC battery = 3V
DRAMRST# = 1.34V
PLTRST# = 1.8V

Not measured:
PL101, PL102,...

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mauda replied to Lenovo G50-30 no POST on powerup

in Troubleshooting Laptops, Tablets, and Mobile Devices

01-21-2021, 01:42 AM
Re: Lenovo G50-30 no POST on powerup

I will measure all power rails before/after power on again and write them here.
I hope that this motherboard is not death

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mauda replied to Lenovo G50-30 no POST on powerup

in Troubleshooting Laptops, Tablets, and Mobile Devices

01-20-2021, 12:48 AM
Re: Lenovo G50-30 no POST on powerup

@piernov
Known good compatible DDR3L RAM = yes, I tried.
Caps lock key triggering caps lock = no LED indication
PLTRST# present = 1.8V

Any other idea?

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Last edited by mauda; 01-20-2021, 12:56 AM.
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Sony TV model KD-65XE7005 - only Sony logo for 3 seconds

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Lenovo G50-30 (LA-B102P) no POST when power on

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