Hi,
I have this laptop that powers on, all signal LEDs ok, the battery charges,the keyboard light is on, and the fan spins but nothing shows on screen.
I measured the coil voltages and resistance, all seems good. The CPU coil is only 3ohm but this is an 11th gen CPU so I think it's ok. All voltages are present though +1.05VALW line fluctuates a bit from 1.02V to 1.06V.
The CPU gets hot pretty fast after power on (both the CPU and PCH), to the point that without the heatsink, the system turns itself off only after a few seconds.
I backup the BIOS, Clean ME, replace the bios region from extracted Lenovo website bios and reflash the new bios into the system but the screen is still black.
I also tried flashing the extracted Lenovo website bios since it's a full bios however the screen is still black.
One weird thing I notice is that the original bios don't seem to have any DMI info.
This laptop has dual bios chip,onboard RAM, with no discrete VGA. The Schematic is not available. Model: 13ITL5. Board number: NB2608_MB_V4_PCB. The original bios is attached below.
Can anyone suggest me what to do next? I'm stuck.
I have this laptop that powers on, all signal LEDs ok, the battery charges,the keyboard light is on, and the fan spins but nothing shows on screen.
I measured the coil voltages and resistance, all seems good. The CPU coil is only 3ohm but this is an 11th gen CPU so I think it's ok. All voltages are present though +1.05VALW line fluctuates a bit from 1.02V to 1.06V.
The CPU gets hot pretty fast after power on (both the CPU and PCH), to the point that without the heatsink, the system turns itself off only after a few seconds.
I backup the BIOS, Clean ME, replace the bios region from extracted Lenovo website bios and reflash the new bios into the system but the screen is still black.
I also tried flashing the extracted Lenovo website bios since it's a full bios however the screen is still black.
One weird thing I notice is that the original bios don't seem to have any DMI info.
This laptop has dual bios chip,onboard RAM, with no discrete VGA. The Schematic is not available. Model: 13ITL5. Board number: NB2608_MB_V4_PCB. The original bios is attached below.
Can anyone suggest me what to do next? I'm stuck.
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