Comments on: Dead P4P800 Desktop Repair

By: Humberto

Humberto — Thu, 01 Apr 2021 16:07:08 +0000

Wow! Albert an old MotherBoard, I had not seen one, years ago.

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 27 Mar 2021 15:04:58 +0000

In reply to Lynn Blakely.

You summarize exactly what I was trying to say Lynn. Thanks for your appreciated reply!

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 27 Mar 2021 11:00:54 +0000

In reply to ivan1.

Thanks ivan1. If we only would have the smallest needles available that could make a difference. Sadly the only hypodermic needles I have are those that were bought as replacement ink sets to inject new ink into my old HP printer cartridges. But they are still too thick to be of any use here. And I have completely taken apart those old now obsolete HP (710 color, 840C) printers for spare parts. My secondhand Brother DCP-385C deskjet printers are so much more trustworthy and cheaper in use of ink and never disappoint! (and this Brother printer always needs live 230VAC input power to control and clean the ink channels to prevent them from drying out!, which never was any good on HP or Epson printers!)

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By: ivan1

ivan1 — Sat, 27 Mar 2021 02:04:24 +0000

HOLA a todos mi solución casi infalible ,uso agujas hipodérmicas las cuales redondeo ligeramente su punta ,para evitar que se doble ,al ejercer presión sobre ellas girándolas para que no se peguen ,mientras caliento por el otro lado con la punta del cautín ,las hay de muchos diámetros y se pueden usar muchas veces por ser inoxidables ,claro que las vende con las jeringas ,estas las uso para limpiar con alcohol isopropílico secciones estrechas en los circuitos evitando usar solventes es spray
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HELLO everyone, my almost infallible solution, I use hypodermic needles which I slightly round their tips, to prevent them from bending, by exerting pressure on them by turning them so they do not stick, while I heat on the other side with the tip of the soldering iron, there They have many diameters and can be used many times because they are stainless, of course they are sold with the syringes, I use them to clean narrow sections in the circuits with isopropyl alcohol avoiding the use of solvents is spray

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By: Lynn Blakely

Lynn Blakely — Thu, 25 Mar 2021 20:37:23 +0000

Albert: You made the best choice, the easiest, and the fastest. After all we may want to make it look original, but sometimes that is not practical, to result in taking too much of a risk, as you have already said.

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By: Albert van Bemmelen

Albert van Bemmelen — Thu, 25 Mar 2021 11:24:58 +0000

I completely agree Lee! They don't make it any easier these days! Like the many bga mounted chip problems that require hotfixing or completely replacing bad GPU or other mainboard controller chips. Which require new tools, new techniques and much time to fix the problem. Luckily there was no need here to mount the replacement e-cap(s) on the component side again because there was plenty of space on the solderside anyhow. And the result was the same and the repair much quicker!

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By: Lee

Lee — Thu, 25 Mar 2021 05:37:48 +0000

I have repaired Motherboards using all the techniques stated over years. Getting that solder out of the holes is a real pain.

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By: Albert van Bemmelen

Albert van Bemmelen — Wed, 24 Mar 2021 11:20:26 +0000

In reply to Yogesh Panchal.

Yes if you have those made very thin needles you could try to pick open the vias. With the risk damaging the through hole vias or the tracks to them. But there was no need at all to place the replacement capacitor on the component side again. Placing two of them was easy and got the computer running again just fine! And this way I didn't have to disassemble the computer mainboard, remove any wiring or connected device either. And everything was up and running within minutes!

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By: Yogesh Panchal

Yogesh Panchal — Wed, 24 Mar 2021 08:01:55 +0000

Albert,
Good attempt!use Good quality Flux and De-soldering wick or using Blunt syringe needle also good idea. I made for me using hand sewing steel needle ( I made 3 with different thickness of needles ) by providing proper finger grip using small Ball pen plastic Cap filled with M-Seal Regular Epoxy Compound Adhesive Putty in it.

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By: Albert van Bemmelen

Albert van Bemmelen — Wed, 24 Mar 2021 05:49:18 +0000

In reply to Anwar Y Shiekh.

I have in the past bought those specially for these kind of repairs, but as said they also didn't fit through the holes without the risk of damaging the tracks or the through hole vias!

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