Hi goodday to all.
I really ask for help.
There are two motherboards (absolutely identical) Acer Aspire 5 a515-52g, EH5AW LA-G521P.
Both boards have exactly the same fault symptoms. It turns on, the power indicator lights up for 5 seconds, turns off (the fan does not spin).
Both boards are flashed with Bios Main and Bios EC from the “Bios Acer A515 LA-G521P FULL TEST” topic. XM25QH128AHIG replaced by W25Q128JVSIQ (also NOR-FLASH, XM was not detected by the programmer). On one of the boards, KB9022 was changed, followed by firmware. The fault persists on both boards.
The general nutrition picture is as follows:
+5VALWP (PL401) is always present when power is applied.
+3VLP is always present when power is applied.
+3VALWP (PL402) appears when the power button is pressed.
+1.2VP (PL502) appears when the power button is pressed.
Power is supplied to the Bios when you press the power button, but there is no readout (there are just high levels on the SPI bus).
More details on the levels, based on the “PWR Sequence” from the datasheet for the board:
+RTCVCC – 3V
SOC_RTCRST# - 3V
+19VB – 19V
+3VLP – 3.3V
EC_ON – 3.3V
+5VALW/+3VALW(+3VALW_DSW...) – 5V/3.3V
SPOK_3V_5V – 3.3V
+1.8VALW_PRIM – 1.8V
+1.8VALW_PG – 3.3V
+1.05VALW_PRIM – 1.1V
EC_RSMRST# - 3.3V
AC_PRESENT – 3.3V
PBTN_OUT# - 3.3V (the oscillogram matches, that is, it has a short dip when the button is pressed)
PM_SLP_S5# - does not rise (not used anywhere, only control point T84)
ESPI_RST# - does not rise
Everything else doesn't rise.
Just in case, I tried the recommendation from the topic “Acer Not Powering la-k701p” to bypass the “thermal protection”. Unfortunately, the problem has not gone away. In this version, +3VALW appears immediately when +19V power is applied (this is natural, since MAINPWON appears with KB9022, which is translated through a jumper to 3V_EN), but when you press the power button, the board also turns on without starting and turns off after 5 seconds.
Thank you. I really hope for help.
I really ask for help.
There are two motherboards (absolutely identical) Acer Aspire 5 a515-52g, EH5AW LA-G521P.
Both boards have exactly the same fault symptoms. It turns on, the power indicator lights up for 5 seconds, turns off (the fan does not spin).
Both boards are flashed with Bios Main and Bios EC from the “Bios Acer A515 LA-G521P FULL TEST” topic. XM25QH128AHIG replaced by W25Q128JVSIQ (also NOR-FLASH, XM was not detected by the programmer). On one of the boards, KB9022 was changed, followed by firmware. The fault persists on both boards.
The general nutrition picture is as follows:
+5VALWP (PL401) is always present when power is applied.
+3VLP is always present when power is applied.
+3VALWP (PL402) appears when the power button is pressed.
+1.2VP (PL502) appears when the power button is pressed.
Power is supplied to the Bios when you press the power button, but there is no readout (there are just high levels on the SPI bus).
More details on the levels, based on the “PWR Sequence” from the datasheet for the board:
+RTCVCC – 3V
SOC_RTCRST# - 3V
+19VB – 19V
+3VLP – 3.3V
EC_ON – 3.3V
+5VALW/+3VALW(+3VALW_DSW...) – 5V/3.3V
SPOK_3V_5V – 3.3V
+1.8VALW_PRIM – 1.8V
+1.8VALW_PG – 3.3V
+1.05VALW_PRIM – 1.1V
EC_RSMRST# - 3.3V
AC_PRESENT – 3.3V
PBTN_OUT# - 3.3V (the oscillogram matches, that is, it has a short dip when the button is pressed)
PM_SLP_S5# - does not rise (not used anywhere, only control point T84)
ESPI_RST# - does not rise
Everything else doesn't rise.
Just in case, I tried the recommendation from the topic “Acer Not Powering la-k701p” to bypass the “thermal protection”. Unfortunately, the problem has not gone away. In this version, +3VALW appears immediately when +19V power is applied (this is natural, since MAINPWON appears with KB9022, which is translated through a jumper to 3V_EN), but when you press the power button, the board also turns on without starting and turns off after 5 seconds.
Thank you. I really hope for help.
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