Is the any affodable tool to Soldering the Northbridge
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Re: Soldering Northbridge
It's tricky, but there are hot-air desoldering and reflow tools that are used to desolder/solder BGA packages. You also need the right stencils to apply solder paste on the solder pads on the PCB.
The main issue is not soldering/desoldering, but functional testing to ensure that it is correctly soldered. The manufacturer has board-level ATE testers to check for complete functionality using a JTAG or boundary-scan test. Anything that fails is scrapped or sent for rework, depending on the fault. That kind of capability would be well out of reach of a small repair outfit - the entry costs are upwards of $1M.
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This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.
There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as... -
HP DMI Tool is used to Extract DMI information from a HP BIOS Bin.
DISCLAIMER: badcaps.net and its members do not support unlocking stolen or company-owned devices.
The DMI Tool given here are for personal use only.
************************************************** ***********************************************
DISCLAIMER: THE HP DMI Tool IS FREE AND ARE INTENDED FOR EDUCATIONAL PURPOSES ONLY.
You CAN download it, use it.use it.I only ask that you DON'T modify it ,sell it or try to make a profit
from it, and that you please credit the author... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
REWORK FLUXES Multifix 425-01 and 450-01 are tacky fluxes designed for use in a wide range of electronics assembly and rework processes. They represent a range of activities and residue levels to meet different customer requirements.
- No Clean Formulations
- Low residue
- Range of activity to deal with different component solderability
- Halide free
- Suitable for dispensing
- Compatible with solder coatings and/or No Clean flux cored solder wire product range
Both products are supplied in syringes or cartridges for application by dispensing....10-07-2024, 06:02 AM -
Hi!
Went dumpster-diving and found a bricked Lenovo P14S in trash, few weeks earlier. Symptoms - no screen, no POST, no beep, just keyboard LEDs flashing on powerup. Mute button+LED was responding though, and the display self-test was still working (via the key combo Ctrl+Fn+Power held for some seconds, see the Service manual).
Incidentally, Windows 11 have recently started auto-flashing computer BIOS in our region. Even more suspiciously, Lenovo has released a BIOS update just few days before the PC was trashed. About a week later, the BIOS update image has been oficially marked...04-14-2025, 01:56 PM
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