macbook a2251 no power

[Arshad alam4659]

i have a macbook a2251 820-01949-a 5v stuck with 0.274ma
some measured volt
PP3V3_G3H_RTC=3.3v
PP3V3_UPC_X_LDO=3.3v
PP1V8_SLPS2R=1.8v
PPBUS_G3H=12v
PP3V3_G3H=3.3v
P5VP3V3_VREG3=3.3v
PP5V_S5_LDO=0v
PP20V_USBC_X_VBUS=0v...

[porfyriadhs]

Hello I need help please after installing a New mainboard in the Samsung UE32 tv everything was inverted I tried and flipped the screen from service menu. But I did something with colors . Hello me please screen is green

[dhudy]

hii all
help please..
need hp envy x360 la-m024p laptop schematic. thanks so much before ..

[didouche1200]

PLEASE BIOS CLEANED FOR HP 640 G5
SN 5CG0209D3M
issue no display no old bios

[Biostechnology]

Lenovo Ideadpad gaming 3 15ACH6

hello, please fix my bios, no display
DC LOAD 0.500 UP 1500 AND DROP O.450 CONTINUOUSLY
here is the board code :
LA-L171P S/N MP24LQ1T
MTM 82K201RSIN
model : ideapad gaming 3 15ACH6...

[ak1_2004]

hello
The laptop is turned off during the BIOS update and it turns on with the attached BIOS and works properly, but without battery!
If I connect the battery after turning on the laptop, the laptop works correctly with the battery, but when I turn off the laptop, it only turns on again if the battery is removed and the BIOS of the laptop is reset....

[oxonater]

Hi everyone hope all are well

I need a little expert advice on a issue I have and seeing as this forum is full of clever people I thought ask here as you never know.
I recently repaired a logic board 820-01700 which belongs to a 16" 2019 Macbook Pro, however I seem to be missing a component near the T2 Rom chip and is U4730.

The schematics say this chip is (M34128-FCS6_P/T) and it also says there is a bypass for it wondered if anyone come across either the IC or the bypass method.
I suppose it's worth noting googling the part package brings up various...

[trepachka]

Hello, I have this Inspiron 14 5430 that refuses to start. Computer charges and reacts to pushing of the power button by lighting up the keyboard. It blinks twice rapidly, then after about a 5 sec pause, repeats the same keyboard blinking pattern again.

I checked and all voltages are present including PCH and CPU. Indeed, the CPU warms up pretty quickly. But the computer does not post.

I suspect this could be either BIOS or EC issue. At this point I would like to see if reflashing BIOS will solve the problem.

Could someone, please take a look at provide rebuilt...

[isaac Villanueva sanchez]

pls help remove bios password
SN 5CG3094VN7
PROID 72J17LS
HP ELITE DragonFly g3

, I am using the tl866 II plus programmer but the Winbond 25Q256JVEN model is not there, so select another one, I hope it works....

[notallbad]

I had been using wave audio files to play via the headphone jack to an ir led but had difficulty getting the InStop file to light the led, no sign of life when viewing the led through the camera app on my mobile phone.

Anyway, came across this free android app called IR Wave Plus that can utilise a homemade audio jack to ir led lead.
Not limited to just LG either!

A few settings require adjustment but the app itself is rather straightforward.
In settings ensure the slider bar is set to maximum and Force volume to 100% for audio ir blaster is ticked.
...

[Mehmet Korhan]

Here is my info, does anyone know how to remove SWAT lock? Says DeviceFreeze-3472

HP ZBook Firefly 14 inch G9
SN: 5CG3014FGF
M/B SPS: N22219-601
WARPATH-MB-AVARY
6050A3417601-MB-A01

32MB DUMP ATTACHED
Winbond 25Q256JVEN
2217
6146
2C40001...

[tommy97]

Hi guys, I do need a working dump of the bios for PS5 Digital edition EDM-020 CFI-1108B, tried to fix my one however no luck, console stuck in safe mode with error code: SU-101312-8.

You can also check my dump in attachment....

[groomit]

Hello,
currently I'm tinkering with above mentioned broken device. It started with a shorted PD controller. I replaced it and have an open topic on this forum on reprogramming it.
Currently I'm powering it with a bench supply soldered to the battery connector (laptop battery is dead).
This way the device is booting into BIOS and Diagnose mode fine. But when I try to restore the factory image during diagnose the laptop always greets me with "no bootable device".

Looking at the bios the ssd is recognized (shown with type and size in some storage menu). But...

[mido50]

hi guys, I need Tp link td-w8950nd V2 working dump

[ricsix]

Hello Guys!

I recently bought a PS5 with WLOD.
Somebody already worked on it and knocked off some diodes unfortunately.
It can go to safe mode, and boots up perfectly to system aswell. I hear backround music from the controller with earphone and somehow started a game.

I need your help to find / indentify these components to complete the circuit.

What i looking for are circled in pink.

Thanks for your help!

[PCTechnics]

Hi guys need a working bios. killed by windows update....

Model:Lenovo Legion 7 16ACHg6 Type 82N6
SN: PF366HP7
Mother: NM-D563 Rev:2.0
Corrupt bios GKCN60WW included

Many thanks guys! 🍺...

[killersoft]

Hello guys,

I have an Acer E5-771, it doesn't turn on, the voltages 3v and 5v and 1.8v are available

Can you help me find out where is this problem plz ?

Thanks

[survivalbloke]

*RESOLVED* - my mistake

[federicoc]

Hello everyone, I am struggling with an Asus notebook that does not boot, I have not detected any shorts so far.
I checked the following power lines

+3VA_EC: 3V
+3VA_DSW: 3V
3VA_DSW_PWRGD: 3V
PWR_SW#: 3V
+3VS: 0 (Is there any problem or is it normal?)
+3VSUS: 3V
+3VACC: 3V
+3VPLL: 3V
EC_RST#: 3V

RAM
P_1.2V_VDD_20: 0V
P_1.2V_VDDP_30: 5V
P_1.2V_CS_10: 0V
P_1.2V_ S3_10: 0V
P_1.2V_S5_10: 0V
P_1.2V_TON_10: 17V

Do you have any indications on where the problem could be? Many...

[ub6ib969]

hi,
Ordered the exact bios IC MX25L25673G and download the latest BIOS Version 3001 from the asus. Neoprogrammer detects and reads the bios however when flashing, I receive the following error "Buffer size not equal to IC size". Tried flashing without renaming and with using the asus bios renamer, am I missing something ?

[hamoudasat]

Thank you in advance.
Unit Powers on, fans rung at full RPM, no post or display. I suspect corrupted bios. old eprom damage

dag3himb8c0
15-ec2259nf
prodid 6P190EA#ABF
SN 5CD230BQCN...

[NickInBrooklyn]

Hi, i’m trying to repair my Bass amplifier. I shorted cable blew the outputs. I tried and failed a long time ago to replace them and then let it sit for years and now I am working on it again. I think I’ve succeeded this time but I have to replace a circuit protection fuse first before I know . The power supply board in the amp is putting out 76 V and about 16 V. The 16 V seems to be going through a 12 V regulator to power the chips on the amplifier board. The 76 V for the Mosfets is currently blocked by the aforementioned mentioned blown fuse.

The amplifier board has three ics-...

[leawell]

Does anyone have a schematic or boardview for this board, please?

[Bartoloni]

Laptop is HP 15s-FQ0039NL
Product ID: 81K9BEA#ABZ
s/n: 5CD310GPPM
FEATURE BYTE: 3K6b7K7P7WaBapaqasawb6bCbhcbdUdpdqtPhYm9.aF

i can provide the dumped bios ( that has a power consuption of laptop of 150ma with strange flashes on screen with restarting)
and also a bios that i found online ( that make laptop uses 250ma , without flashes and not restarting)

thank you to everyone can help me

P.S: Eeprom is XMC QH64AHIG...

[mrsz1]

Greetings,

I have an Acer Nitro that suddenly turned off while I was using it. No lights, no power, stock DC power supply goes into safe mode when plugged, battery connector is also seem to be shorted while the battery is connected. No visible faulty components are on the board.
Narrowing down the issue I found shorted dGPU 1V_VGACORE rail to be a suspect.
Removing PU8510 (and PU8511) seems to eliminate the issue, the laptop is working on iGPU, charging (new battery) is also fine.
Replacing PU8510 or PU8511 did not seem to solve the issue, the same symptoms come...

[mrsz1]

Acer Nitro 15 VN7-593G Schematics & Boradview...

[master3112]

Hello everyone,

I have a Lenovo IdeaPad 5 15ALC05 NM-D701. When I press the power button, the fan comes on, the power button flashes but the screen remains black. The device has a current consumption of 0.7A. I only have a BoardWiever for the device and no schematic. I have already tried to rewrite the BIOS, but the behavior is the same.
I have checked all voltages and everything fits:
PU1901 LV5028RPC - works
PL6202 -5.08V
PL6201 - 3.32V
PL300 - 0.77V
PL2101- 1.8V
PL1901 - 0.77V
PL1902 - 1.8V
PL1903 - 1.21V
PL5601 - 1.10V...

[djimy]

i have an hp elitebook 840 g8 that used to belong to a company i bought it second hand it has no password on the bios but after installing windows and connecting it to the internet it get locked by hp wolf security the only solution i found is installing linux on it but when installing windows it get locked after using for a few hours i could not find how to disable it on the bios settings if anyone know how to remove this i attached a bios dump and the motherboard info

[I]CORVETTE[/I]-[I]6050A3217501[/I]-MB-[I]A01[/I] ([I]A1[/I])(1086) L2i have an hp elitebook 840 g8 that used to...

[RetroComputingGrotto]

This TV has been on the wall in our reception area for around 10 years and the other day the backlight failed. You could see a feint picture so we knew the screen was OK. I took the TV apart to get to the failed backlight and inject voltage in to each half of the LED strips to identify which ones had failed and 4 needed replacing. I ordered a set off of Amazon and they arrived the next day.

On fitting the new LED strips I plugged in the TV was blinded by the light!!


[URL=filedata/fetch?filedataid=357626][ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3490560}[/ATTACH][/URL]...

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The Allwinner H5 is a highly cost-efficient quad-core OTT Box processor, which is a part of growing home entertainment products that offer high-performance processing with a high degree of functional integration.

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[1centchips]

Removed the two chips from the broken lcd at 350C and 40 air by properly protecting rest of the area with copper and kapton tape.
Did the same with the new replacement panel.
Reballed the pulled chips and installed on the new lcd panel at 250C and 40 air
I have done few ones before without issue.

The new panel was working before I transplanted the chips. Now the computer turns on and boots but no image/ backlight. (
Anybody face this issue before?

[CapSnap123]

I have an old "Adjust-a-Volt" variac. Shortly after I bought it, it started smoking and now the windings look burned for about 2 inches around the left side. Is it possible to fix this or bypass the shorted windings? I'm not sure how to detect where the bad windings are, except by appearance.

[Yacine007]

Hello everyone i need bios bin for hp chromebook 14A G5.
ProdID : 7DF07EA
SN : 5CD0427FB3
THANK YOU IN ADVANCE

[zibik]

Need boardview for restore broken mb.
Schematic would be helpfull too
Thx

[spleenharvester]

One of these is for the 25Q20 chip, one is for the larger 25Q40 chip at the end of the board. These are dumped from a scrap board so I cannot test them, so make sure you back up your original BIOS just in case!

Note that if you are getting fan failed errors even though your fan is spinning fine, it is usually actually a problem with the sensor on the fan itself and not the mainboard or BIOS....

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