dhs6512
Member
Last Activity: Yesterday, 09:16 AM
Joined: 10-03-2019
Location: Vilnius
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Charged battery (in this unnormal cycle mode) to about 15v and now voltages at PD101: 1pin 780S_VCC_R 14,74v, 2pin VIN 0,002v, 3pin BATT+ 14,93VLeave a comment:
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JBATT1: 1-4pins VMB +14,1v, 5pin EC_SMCA pulses (photo), 6pin EC_SMDA pulses (photo), 7pin BATT_TEMP_IN 0vLeave a comment:
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Lenovo Legion 5 15ARH05H, NM-D281 Rev: 1.0 not work with the battery
Hello. Lenovo Legion 5 15ARH05H, NM-D281 Rev: 1.0 board
Initially dead. Inspection: the board was not touched, on EC IT8227E-192 2101-CXA there is a mini-burnout.
Replaced with the same one, flashed the EC with the official firmware (had to solder to the pins), left the main firmware (Gigadevice 25LB128DSIG) original.
When connecting the charger, the device started, gave picture and works, checked all the functions - ok.
Connected the original battery. Only on the battery the device starts for a second, lights up the keyboard backlight and turns off.
When connecting... -
in my case 300W USB type adapter has ID voltage 3.0V and resistor from ID to GND 8.65KohmsLeave a comment:
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Original screen B156HAN13.1 HW:3A FHD 40pin 144Mhz compatible with 120Mhz, test screen N156HRA-EA1 has the same specs as original. With or without screen no signal on HDMI. Measurements on test screen 40pin connector with new edp cable H560 EDP Cable 120Hz DC02C00RV10 REV.0A:
18,19,20,21 +LCD_VCC 3,3v 3 times up and 3 times down
27 HDP 2,5v 3 times up and 3 times down
32 BL_EN 0v
33 BL_PWM 0v
36,37,38,39 BL_PWR 20v always
22 selftest/nc 0
15,16 AUX lane three times cycle: up, 0, down, 0
LID_SW 3,3v always on JEDP1
thank you.Leave a comment:
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Lenovo Legion 5 15ACH6H Starts, greeting sound, no picture anywhere
Hello. Lenovo Legion 5 15ACH6H 82JU PF303BT1, board HY660 HY661 HY561 HY572 HY56C HY57K NM-D562 Rev:2.0 2021-01-25.
Starts up, the keyboard backlight lights up, the sound of the Windows 11 password entry window loading is heard, the backlight brightness is adjustable on the keyboard,
when pressing caps or numlock there is an indicator, there is no picture either to its own or to an external one via HDMI. I checked the board under a microscope, ok, clean and untouched.
I threw in a matrix (FHD, 40 pin, 144Hz), flashed the BIOS (official, took the latest gkcn65ww and one earlier... -
[B][URL="https://www.badcaps.net/member/302696-isa198585"]isa198585[/URL][/B] Hello. Have you any update ? My case is the same, board NM-D562 Rev:2.0[B][URL="https://www.badcaps.net/member/302696-isa198585"]isa198585[/URL][/B] Hello. Have you any update ? My case is the same, board NM-D562 Rev:2.0Leave a comment:
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[URL="https://www.richtek.com/assets/product_file/RT8097A/DS8097A-12.pdf"]6V, 2A, 1MHz, CMCOT Synchronous Step-Down Converter (richtek.com)[/URL][URL="https://www.richtek.com/assets/product_file/RT8097A/DS8097A-12.pdf"]6V, 2A, 1MHz, CMCOT Synchronous Step-Down Converter (richtek.com)[/URL]Leave a comment:
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It is Silergy SY8388BRHCLeave a comment:
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Recognize component
Hello. Device HP Envy x360 2-in-1 Laptop 15-ew0777ng, serial CND2352Q0Q, motherboard IPA52 LA-M021P Rev:1A. Water damage, no start, become hot 16-pin 2,5x2,5mm PU301, marking yQEGB. Please help to recognize. Thank you. -
PU3501 BQ24781Leave a comment:
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mon2: thank you for your help. Not found what it is, issued without repair.Leave a comment:
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Pin #5 has no connection to any component nearby including CYPD5125, except two direct connected to via resistors. And pin #5 has 2ohms to GND, without mystery chip.Leave a comment:
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Photo attached: #2 is GND, #1, #3, #4 have not links to external parts, only resistors and capacitors from this chip, #5 links to other motherboard side, nearby CYPD5125 (USB Type-C Port Controller)Leave a comment:
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No, #1, 2, 3, 5 of sot23-5 1,8mohm to #17, 18 lcd conn, #4 of sot23-5 2,8mohm to #17, 18 lcd connLeave a comment:
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If we consider that pin#1 is left of the lcd connector ( there is no marking on the PCB at all), then pin #1 IC – pin #1 lcd conn mohms, pin #1 IC – pin #2 lcd conn mohms, pin #1 IC – pin #29 lcd conn (GND) 9,69kohm, pin #1 IC – pin #30 lcd conn mohms.
I think this lcd connector has big difference from your posted schematics above. I think this connector has backlight power (2, 3, 4, 5), GND (9, 10, 11, 12 ,14, 15, 20, 23, 26, 29), LCDVDD (17, 18), differential pairs 21+22, 24+25, 27+28Leave a comment:
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The circled via hole is GND. Removed IC and measured resistance to GND at all five contacts, photo attached. Nothing from them have direct connection to lvds connector. Seems not good at leg 5.Leave a comment:
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Thank you. Yes, I know, I want to replace this component, but cannot find what exactly it is.Leave a comment:
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device year 2019Leave a comment:
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