Weird post problem on a Dell Optiplex 755

[paulwal]

Hi. I am having what seems to me an odd problem with an old Optiplex 755 SFF. It refuses to post without clearing the CMOS (removing the battery). Have tried a number of things like changing RAM, Updating BIOS a couple of times (now at A21). Has anyone run across this and have any ideas for a fix?. Thanks in advance. Paul

[techpointhull]

Hi Guys,

Got a weird one here. I have a HP OMEN 16-WF0032TX that's in my shop for no power. If I disconnect the battery, and the AC adapter and hold the power-on button on the keyboard, when I connect the adapter the laptop powers on. If I shutdown and close the lid, once I re-open the lid and press the power button, no power. If I shutdown and keep the lid open, when I press the button the laptop powers on.

I have checked around the display connector if I can see anything that doesn't look right, its like an issue with the lid sensor. Has anyone seen this before?...

[huzo]

I noticed in manny cases the following : You press the power button and laptop starts turning on and then goes off again, but if you press any key on the keyboard and hold it, the laptop stays on and works fine! The power button works, any other button works , but one button must always be on!

Has anyone else notice that? I was meaning to write about this topic a few times already , but never got to it, and today i got Aspire A315-42 with i5 10th gen. and it has the same issue and i got mad and now i am writing about it!

If you hold any button on the keyboard the laptop...

[Ancient1]

Hi

Photos tell it all really.
The bulge in the area before the panel Matrix .
To me it looks like a local short that heated inside.

Should I waste my time in flipping the panel , as if this issue can be repaired ?
The distribution board at this end looks ok , though I did not measure anything

What are your thoughts ?

Cheers

[PontyPCs]

Hi people.

I have been trying to get my head round these issues with the eMMC putting the TV in to a boot loop condition, or completely dead, when a dump of the Boot 1, Boot 2 and USERDATA partitions have been made, the MLC lifetime counter has been reset, using the original eMMC with the RPMB partition intact and the eMMC is flashed with the original dump, Netflix and a few other Apps don't work. i assume all the DHCP keys and factory programmed RPMB access Key will be contained within the original dump, and as we are re-flashing the original eMMC i would expect every thing to work....

[Jovica123]

Hello,
i have here Samsung UE55AU8072U no standby light.
Panel model : CY-SA055HGXY1V
Motheboard model : bn41-02844A bn94-16868V
When i press the power button,standby light turn on,after i release it immediately turns off.
Unplugged main board from power supply - BACKLIGHTS COME ON.
I think the motheboard is problem.
I fixed two TV with same mistake,but they were 6000-series,there was a problem with the contents of the w25q40 chip.
Here are all dumps : ic801(24c512),ic1603 and ic1604(25q40)....

[madjid911]

I have an HP Zbook 15 G4 (LA-E161P motherboard) which does not start, there was a short on a capacitor supplied with 3V, I replaced it, no short now, I found the 3v voltage but it doesn't start.
When I plug in the charger, the LEDs flash all the time, when I press the power button the LEDs stop flashing, I saw a post from someone who had the same problem and who had reprogrammed the bios and EC, I tried I reprogrammed everything but the result remains the same, I also changed the SIO chip if ever it was defective, and the 3V chip, but nothing changes.
Do you have an idea ? THANK ...

[Raulnn]

good morning! I have a problem with this Sony. The image has a pattern of black horizontal lines, I attach a photo of the lines. The power supply is external and emits a sound. I don't think it's because of that. Let's see if someone can help me.

[vikrep]

Ideapad 1 14IGL05 Model name: 81VU

Motherboard: S150IGL SVT MB
19705-1M
448.0JB02.001M
S/n R912P879

I have an original dump from my motherboard (bios password on it)
Could you help me reset it?
Thank you

...

[Leone22]

Hello community. I need your help to resolve the problem with my HP envy 15 notebook mod.15-k111nl. The problem is the following: inserting de connector of the notebook, the LED on the connector lights on but if I pressed the power button it doesn't happen Nothing.
I did some tests to verify where the fault could be and I noticed there are 3v but the 5v does not arrive.Furthermore I have a series of mosfets that seem to be in short circuit but desoldering them and testing them on the bench they are good. These are the signals that I found:
PL8:3,117v----PL9:0v---PL12-----PL13:0---PL16:0v---PL20:0v---PL16:0v----PL13:0v--...

[volcour]

hello everyone i need original bios and EC of this laptop

[COLOR=#2980b9][B]L14 Gen 2 Type 20X2-s2c100[/B][/COLOR]

SN [COLOR=#e74c3c][B]PF3G8DFB[/B][/COLOR]hello everyone i need original bios and EC of this laptop

[COLOR=#2980b9][B]L14 Gen 2 Type 20X2-s2c100[/B][/COLOR]

SN [COLOR=#e74c3c][B]PF3G8DFB[/B][/COLOR]hello everyone i need original bios and EC of this laptop

[COLOR=#2980b9][B]L14 Gen 2 Type 20X2-s2c100[/B][/COLOR]

SN [COLOR=#e74c3c][B]PF3G8DFB[/B][/COLOR]hello everyone i need original bios and EC of this laptop

[satoru.JPN]

Hello! everyone! I would like to know the value of the chip resistor at the location in the image. thank you....

[ktmmotocross]

Microsoft Surface Pro 6 - m1086841-003 - burned two components, need boardview

[WWind]

Hi, I need bios for Acer Aspire U5-620 All-in-one, Motherboard is Florence23_Intel MB 13093-1 48.3NG05.011, all voltages are ok

[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3160283}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3160284}[/ATTACH]Hi, I need bios for Acer Aspire U5-620 All-in-one, Motherboard is Florence23_Intel MB 13093-1 48.3NG05.011, all voltages are ok

[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3160283}[/ATTACH]...

[resistor83]

Hi everyone, a customer brought me an original Apple SSD (mz-jpv2560/0a4) from a 2015 MacBook Pro to ask me to recover the data. He told me that the computer was taken to the Apple center but that there was a problem with the motherboard and therefore it could not be repaired....
However they removed the SSD so for try to recover data
I tried to insert this SSD into another 2014 MacBook Pro that I had but the SSD could not be seen either from the recovery or from an operating system started from USB (BigSur or El Capitan)
I also tried with a USB adapter but nothing
I also...

[ozguven]

When the power is turned on, a snapshot appears on the screen and it turns off. 2 red LEDs are flashing.

I disconnected the power module cable going to the main board. I threw a power on jumper with 3.3 v from outside. The relay is working and there is 12v and other voltages in the power socket.

Where else should I look? All fuses appear to be intact.

[ktmmotocross]

Hello.
Have this Lenovo Gaming 3 15ARH05 NM-D191 that came with short on SIO and shorted UI1 USBovercurrent protection ic. removed UI1. I accidently ordered IT8227E-192 instead IT8227E-128 but i soldered it. Now i have 1.1V instead of 3.3ALW. i have vin, +3VLP, EC_ON, 5V_LDO - ok, no short on 3.3VALW /2Kohm+/

where can be problem?

schematic and BV
[URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/96430-need-schematic-and-boardview-for-nm-d19...

[burntonnerings]

Have had two Acer K272HUL monitors die with the same symptoms:

- Blue power light is illuminated while the monitor is plugged in
- Black screen (no splash screen, etc.)
- Power button doesn't do anything

Opened it up and checked for bad caps and components, evidence of burns, etc. - everything looks fine.

Power supply voltages are fine.

There are some signal lines on the power supply harness that goes from the power supply to the logic board, not sure what these should be at.

Anyone have any ideas?...

[burntonnerings]

Have a Pioneer VSX-1021 that goes to MCACC flashing as soon as it is plugged in.

If I enter release mode, it powers on, the screen display is correct, but then it shuts down and goes back to MCACC after a few seconds. I can shut it down to standby (w/o flashing MCACC if I hit the power button as soon as release mode finishes the boot sequence).

Entering reset mode and executing a reset doesn't change this.

I am unable to enter service mode to see the error counts - Enter + Power button doesn't do anything, whether from normal standby or from MCACC flashing....

[dylen]

Need help with a bios issue for HP450 G5 booting with 3 beeps & flash. Bios flashed and now having display but unable to set the Feature byte, factory host based mac address and SMBiosUUID due to unavailability of these codes on the laptop casing. Initial bios + the working one given below. Can someone please repair the initial bios....

[aldopc]

Hello friends, does anyone have any ideas? I have an xps 9300 with backlight problems. I already tried the screen on another motherboard but the problem is on the board... I have seen the schematic but I have not been able to find the damaged component... the Fuse is ok, can someone help identify the damaged component please..

[Maanu]

Dear Badcaps, i got a HP PRO X2 612 G1 with a BIOS password. Im pretty new to the whole BIOS flashing game but i was able to flash a HP Probook 2 weeks ago with help of this forum.
Now with the HP PRO X2 612 G1 i have the problem that im not 100% sure if i got the right IC and if i am doing everything right in terms of reading it.
I use the CH341A to read the BIOS. The Chip i try to flash got "771AW G GBA 609B" writen on it. I tried with the 25xxx and the 24xxx slot but i dont get a read from AsProgrammer :/

I solderd it out and put it on the 25xxx frame that...

[khelane]

Hello
A GA-H110M M.2 motherboard
due to image corruption
This motherboard works sometimes, and after half an hour or an hour, the image is corrupted and shows color lines and the system hangs, most of the [ATTACH=JSON]{"data-align":"none","data-size":"full","title":"IMG_20231207_163935.jpg","da ta-attachmentid":3159934}[/ATTACH]time it happens in the BIOS as well.
With Pliers graphics, the situation is worse and it shows more lines, with Machza graphics it shows only one or two colored lines.
Replaced...

[Prabuth]

Does anyone have, dlid4/d5 la-g202p rev 1.0 board view, please?

[mrmonza]

Hello. I have a samsung ue55ju6875u that hade led backlight problem and the cause was a glitchy conector to the led feedstrip.

The problem now is that the wire pin 1 on the led connector broke lose an shorted against the chassie and now the tv is dead, no red light when plugging in the power cord before the short the relay clicked and it was a red light for a few seconds then it blinked 5 times.

The power board is an bn44 00859a can anyone point me in the right direction what to check to solve the problem or maby someone have an electrical diagram for a bn44 00859a....

[ktmmotocross]

Hello.
Have this MSI GE70 MS-17591 that start without picture. It have mighty Nvidia 8600 gpu so i think it is bad. Dont have schematic so if anybody know if DIS to UMA can be made

[SuborQ]

Hi, can anyone help to remove the password from this bios please?

Laptop details are:
Lenovo LLX-1 MB 203015-1M 448.0MC06.0011 , Mec1503
SN PW-02NREY
TN 20W9-s27900...

[kaffeine]

Hey,
I have a Thinkpad L470 type 20J5 with serial number PF-0UQXWL.
I bought a new bios chip Micronix 25L12873F and tried to program it with CH341A. I used a bios .bin file I found on the forums here with no luck.
The problem is I have no dump file, and erased the chip. Motherboard will start, CPU Fan will run for 2-3 seconds, then stops. Nothing else.
This is a "project" machine and not my main.
Any help will be appreciated. Thanks a lot.

[AlexVG]

Hi.
I have ASUS M5A78L-M USB3 rev 1.01.
The power supply didn't work. I have changed it to another one.
Main responds on the button. The power supply starts up.
P_VCORE_EN, comes to ASP1003QGK-C, but PU1 (PWM power supply to the processor) does not start.
HUB SU1 SB710 (A14) FCBGA528 AMD 218-0660017 receives only one 1.2V supply. Doesn't start and stays cold.
SPI, has all voltages risen but there is no exchange.
Power sequence stops at step 10.
At the same time, NU1 RS780L FCBGA528(HDMI) AMD 215-0674058-00 receives all power and heats up.
CLOCK...

[lolohacko]

hi
I need bios :
model : 15-fa1093dx
mb: dag3dbmb8d0 rev d g3pa
SN:5CD326FFQZ
Prodid : 7N3S2U#ABA

Orginal Backup:...

[rex98]

need boardview or schematic for Asus S530U. maybe someone have here..

[akcn]

Pegatron_P2JCC_Rev_2.0A_Boardview...

[guyandpit]

hello guys im looking original bios for Asus tuf FX506IV. below are the details:

issue: power indicator, charging and keyboard have light and fans spin looks normal but no display. this my friend laptop, he is playing sudden died.

model: FX506IV-AL11T
s/n: L9NRCX069883397
board: dabkxbmbad0 rev. d


i already backup the bin file. if needed let m know thank you and more power to all!

[deepdarkfantasy]

I need schematic for
"ASKEY RTL0010VW"
router....

[miccodan]

Device: Laptop
Brand: Dell
Model: Inspiron 7573 2-in-1
Service Tag:1G8B6P2
Board number: kylo ren 15 16841-1 H7TJX

Symptoms: With original bios the laptop will not post, keyboard and power light flash on/off upon pressing power button and no fans spin. Attempted to use bios found on here and with other bios the laptop powers on and fans run at full speed and stays running but will not post.

original bios is attached. Many thanks in advance!

[bscottjohnston]

I have a D48-D0 that works on all counts except the backlights flash at a constant frequency of about 3-4 times a second. I used the Voltage measurements as seen in this thread ([URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-tvs-and-video-sources/55809-vizio-d48-d0-10241020222-backlight-on-no-picture-new-boards[/URL]) to compare mine.

With CN301 unplugged with set on I have about 90VDC
With CN301 plugged in of course the V varies based on the flickering

These pins have 1.86 VDC not the 3.3 as shown here:...

[fadi-sam]

I need bios for M720q Desktop Type M 10YC please!

Thanks in advance.

[themosttogain]

Hi,

If anyone can help with a BIOS for this laptop it would be greatly appreciated (I even promise a forum donation!) - basically after battery removal, I powered on and got a brief flash of a message about making a recovery BIOS USB (which I have tried multiple times, to no avail) but then just a black screen. Since attempting a BIOS recovery, I don't even now get that brief message, so whether it did actually start trying to update or not I'm not sure, but nothing appeared on screen at any point.

I've now removed the chip from the board and taken a dump file from it...

[ZoneMind6006]

Enjoy, not tried it myself, for a very high end laptop. Grabbed it off one of these sites that forces you to pay in order to see their BIOS bin dumps. I might do another run on one of those if someone wants something specific, not now though.

Hope it'll help someone out....

[ZoneMind6006]

Here's all the bins and other related stuff I have for this old machine. I have a good collection but most stuff has already been posted here so trying to contribute some "fresh" content, hopefully it'll help someone....

[pokyss1]

I NEED FIX THIS BIOS

LG 15z970-gr3hk

EAX67183404

13/14/15Z970 MAIN B/D PCB REV 1.4...

[Young_Silent_Made_IT]

I have a Steinberg UR44 audio interface that I had in storage for a few years, and now that I want to use it doesn't power on. I want to take this opportunity to learn electronics repair so I am trying to repair it for learning experience.

I am looking for guidance on how to proceed with troubleshooting the problem.

I have checked the original power supply with a multi meter and it works.

I visually inspected the PCB board and don't see any issues, except what looks like a possible broken fuse but not sure. I checked it for continuity it reads 97 ohms, but...

[c_demian]

Asus Tuf Dash F15, model FX516PE.
Can you help me decrypt or remove bios setup password?
Already tried removing power, it has no CMOS battery.
Also, pressing Alt + R at the bios password prompt doesn't work.
Decoding with xor method doesn't give anything, encrypted string is 32 bytes....

[Demetrio87]

Hi everyone, I hope someone can help me solve my problem, I have the case of a legion t5 where I have installed an asus tuf gamig a520m-plus motherboard, the audio connection cable on the case is an F_audio connector with 14 PIN , on my new motherboard the connector is a 10-pin AAFP, I saw that there are adapters on sale but at the moment I have no way of having them available in a short time, I made several attempts and managed to listen from the front headphones, only that there are some problems, the headphones are only detected if the microphone is connected, I definitely got confused with...

[Monsterbeats19]

I have a techwood 50ao11uhda It has a child lock on the password has been forgotten that I can't figure out how to remove before I go buy a new main board I was wondering if anyone had a dump of the eeprom for this so I could flash it and save some moneys thankyou joshua

[Blackam8899]

Hello community, I am looking for bios for this device with silkscreen on mother (/99-b6-e1-e8-er HannStar j. E89382 MV-7 (1) 94V-0) WHOEVER HAS INFORMATION ABOUT THIS AND CAN COOPERATE IN THIS SEARCH I THANK YOU! THANK YOU

[computeros]

Please help. I'm looking for a boardview ASUS X540BP REV2.0 . Thanks

[hallmark1730]

...

[shovenose]

Hi all,
I have a cheap rainbow christmas light set off Amazon which has this little power supply that has a button to change modes. I had a white set with the same power supply that I returned but I can't find any other rainbow themed ones that don't use this setup.

Anyway, the problem is every time you unplug them and then plug them in it reverts back to "Combination" mode which cycles through all these annoying tacky effects instead of going back to what you had selected or at least defaulting to "Steady on" which is what I want. So I'm thinking I can just...

[cind12]

Hi guys, i was wondering, i've got 9Ohms on Vmem, one of the mosfet was shortet to ground, so i've desoldered hi and low mosfets nad still low res, then i removed all of the memory chips, and the resistance is still low, so did you had maybe a card with that low res on memories, and the card was working fine ?
Removed the U1866Q and still without result, i dont have thermal cam so can't see where is hot spot when incjeting voltage.
The resistance on core is ok 0.1Ohm ((Power 0.8V when on)
Resistance on 12V 4K ohms (Power present when on)
Resistance on 12V PEX 4K ohms...

[black0hackers]

Can some one pls clear bios password for me. thank you all!
Name: Acer Predator Helios Neo 16
SN: NHQLUCN0013100D8577600
SN ID: 31005538376
BOARD CODE: DAZGRMB2AC0 REV C...

[sancheti81]

HI FRIENDS NEED HELP TO DISABLE ONBOARD RAM IN IDEAPAD S145-15IKB FROM BIN
MODEL:S145-15IKB
S/N: PF219SCG...

[Nairolf]

Hello,
I used HP Unlock tool to remove my bios password but i think it doest work correctly.

Step followed :

1. Unsold the W25Q256JVEN Chip
2. Dump memory
3. Drag and Drop to HP_unlocker.exe
4. I have written to memory the new file
5. Solder the memory to the motherboard
6. Start the computer and i will try to enter in the setup bios menu. At this moment i have loading bar "repair..."
7. Windows startup
8. i restart the computer and i'm trying to go again in the bios setup but the password is always set.
...

[moderator]

Need boardview/schematic for iPad 9th Gen /model no A2602

if anyone can help then it will be great!!

[ashiq]

any one have intersil 9538h schematic pls share..

[FALKLAN]

Howdy everyone!

I have a SUV with a Bose audio system and I'm considering either a system upgrade, or purchasing a complete replacement system while bypassing the integrated Bose system.

On the Bose side, I have not found any specifications yet. It's a decent system but I'm, at a minimum, replacing all the factory speakers, head unit and adding an amp and two 8" subs. The Bose is a 2ohm system and I'm not certain about this point. In order to use a 4ohm set of speakers (component/loud), I would need to install 2 sets of 4ohm speakers wired in parallel to match the...

[BC_TechForum_drb]

Sub: Missing enable on +5v sec pwr rail AMD Firepro D500-B/Mac Pro late 2013

Ref: 1/ MacPro6,1 Late 2013/A1481 MD878LL/A (3.5 GHz 6 Core Xeon E5-1650v2)
Gfx-B: APN: 661-7548 PPN: 820-3533-A AMD FirePro D500-B 3GB Vmem
2/ Figure 1 Gfx-D500-B Front Facing
3/ Figure 2 +5v supply (zoom-in)

Intro:
While troubleshooting a Mac Pro(6,1) referenced above I discovered the +5v secondary supply did not stand up on the D500-B graphics card as a result of a missing enable signal. The +3.3v secondary rail was the only rail that did standup. I tried to perform...