Hello
I have search everywhere for a solution for my problem, but cant find it anywhere.

When I was away to trow some garbage i always look in the electronic bin.
and this time i find a laptop.
Dell G3 15 3500, when I get home i look at the battery, add one harddrive, plug in the powercord.
the lamp for charmig is white.

Tryed to start it, the screen blink for a second, the keyboard lightsup, the fans and HD starts.
but no Dell logo.
I tryed with a hdmi cable to another screen, still black.
I started to search solution and tryed...

darr3amb6d0 rev d Schematic Need Please..
NEC Laptop
VK26TX-M...

I just recieved a working laptop for a quick dc port swap, i tested the laptop on battery it worked, tested dc port issue felt loose, so disassembled the laptop and removed battery connector, swapped the dc port, re-connected the battery connector, inserted dc pin, white led glowed up - stable, pressed power switch, but it didn't turn on, no fan spin and no display. just 1 white led that glows up, doesn't move to orange (charging), i check voltage (battery : 11.37v) (dc input port : 19.3v)(bios : 1.75), i am stumped, there is no shorting on board.

Schematic diagram : bios chip volt...

Greetings everyone.
please, help assist me with the above PC problem.

The boars number is 6050A2559101-MB-A03. The PC does not recognized HDD, neither does it recognized NGFF SSD.

i discovered that the HDD does not spin.
there were activities at the SATA connection.

Pin 2,3,5,6 rises to 400mv then jump to about 4v, again to mv. It continues in loop that way. Same behaviour at pin 20,21,22.

5v is present at 14,15,16.

Pin 18 which is reserved has about 1.8v, sometimes it increases to 2v+.

Pin 8,9,10 is...

Hello,

I have a Lenovo Legion 7 with the following specs:

• RTX 3080
• Ryzen 9 5900HX

A problem started suddenly overnight. The next morning, the laptop wouldn't boot properly — the RGB lighting on keyboard turned on, fans spun for a brief moment, but the screen remained black, and the Caps Lock key didn't respond (no indicator light).
When running on battery power, the laptop would stay in this state for about 35 seconds before automatically shutting off. When plugged into AC power, it would keep restarting every 35 seconds. Holding the power button would shut it down, but...

Hi everyone,

I'm having a serious issue with my ASUS Zephyrus GA401I (4 years old, worked perfectly until recently). The system is lagging heavily, even in the BIOS, and is charging extremely slowly (a few percent in hours), making it nearly unusable. I suspect a motherboard or power delivery issue.

Symptoms:

• Severe lag across the system, including BIOS navigation.
• Slow boot times and unresponsive performance in Windows.
• Battery charges very slowly (e.g., ~5% in 2–3 hours).
• No error messages or BSODs, just extreme sluggishness.

What I've Tried:

• Replaced

...

pwwaa la-6847p rev 1.0 Convert graphics DIS to UMA. Please help.
ATI to Intel Graphics.
Toshiba Satellite C660-1m0

Hello everyone! I have an old hp workstation z420. Xeon E5 1620 v2, 8gb ecc ddr3

Basically, when I plug in the power cable to the power supply, it turns on and off while clicking every time it power cycles. Once I remove the power cable from the supply, it flashes a red light 4 times while beeping for about 10 seconds. I have purchased a new CPU and power supply already, but that hasnt fixed it so I'm convinced it's a motherboard level fault. If anyone has any ideas on what the fault could be, and/or how to diagnose it, that would be highly appreciated. Thanks!

Hi,

I have a MacBook Pro 13 inch A2238 M2 and it was stuck 5V with 0 amps. I measured some important lines and I found a short on PP3V8_AON_MPMU_ISNS_VIN, I tried injecting 1v and I saw heat coming from the mPMU so I removed the pmu thinking that was the problem. I don't know why I didn't check the other side of the border but there it was, a shorted cap. I replaced the cap and the short was gone, so I reballed the PMU and put it on again but voltage was still stuck at 5V and the current was fluctuating between 0 and 0.45 amps. I checked under the thermal camera and I saw the mPM...

Hello Everyone!
I would like to know the Jumper location for the 2 Amber 7 White Led Blink Code error. According to Dell 2,7 Led codes are for display or the Display cable failure. I didn't changed the display nor the cable. The issue happens only when restarting the machine from windows and from the BIOS. And when opening and closing the lid the display turns off and never turns back on. But the machine is working! I confirmed it by pressing the CAPS Lock key. Does anybody has this issue and fixed it by jumpering some fet near the display connector on the motherboard. If So Please Help...

Hello everyone,

I have a question regarding this laptop. Laptop came from my friend, completely dead. No reaction for power button, Adpater etc. Diagnosis: burned HIS mostfet from VRAMs. After replacing the mosfet, Laptop starts to power up, KB lights up for few second and switch off, laptop remain ON but no display. Vents are switching ON after some time. No Caps Lock or reaction on USB stick. No display also through HDMI. All coils resistance seems to be OK except resistance on VRAMs – 15 Ohm ( as I study the other repairs or diagnostic of that laptop it should be around 90 -...

Hello,

I am trying to repair the laptop mentioned in the title. I have been searching posts looking for readings similar to mine but cannot find any. I am fairly new at this so please be gentle 🏳

History:
No water damage, screen cracked. Laptop doesn't draw any amps on USB meter from either USB C port. Removed the board, same no amp draw. No standby light on the board. Apart from dust board looks great! No obvious visible burnt components. At the moment I dont have a Mac charger, its on the way. I am using a samsung USB C charger which should get the board on...

Hi All, I have a 9th Gen Dell Optiplex micro PC motherboard which doesn't power on. When I connect the motherboard with power adapter, it goes into safe mode and turns off. So from info I have gathered online, it looks like there is a short circuit on the motherboard. So can you guys help me with figuring out the issue?

I am new to electronics repair, so my queries could be naive but I am ready to learn.

So I have a multimeter and a solder with me. But I can try to get a variable voltage power supply with a thermal camera as well. From what I seen online, best way is...

Hi,
I have a DA0BKXMB8D0 rev D motherboard.
There is a short circuit on the 1.8V line.
During the short-circuit test, absolutely nothing getting hot, board take 3A.
What can I do now?