topic Re: KVM - Power Supply problem in Servers - General

KVM - Power Supply problem

Yehia Farouk — Wed, 24 Jun 2009 20:45:35 GMT

Dear,

I have a KVM of product number 336045-B21.
the product is out of warranty, and has a faulty internal power Supply DVE with part number DSO-142L, I can't find this part with HP or anywhere else.
any advice??

Re: KVM - Power Supply problem

Pieter 't Hart — Thu, 23 Mar 2017 09:17:14 GMT

a place to look could be
http://partsurfer.hpe.com/

A quick check showed no power supply, but maybe you could contact them.

Re: KVM - Power Supply problem

David Comeau — Tue, 23 Nov 2010 15:11:13 GMT

Yehia,
I am experiencing the same issue with multiple devices. Did you ever find a solution?

Thanks in advance.

Re: KVM - Power Supply problem

The Unkown Tek — Mon, 07 Feb 2011 18:11:45 GMT

I had problems with this same PS DSO-142L. It was making wavy lines (looked out of sync) on the monitor.

I changed out 2 Caps in the PS and its works like new. ($2 in parts)

Attached is some information that might help you fix it yourself.

Re: KVM - Power Supply problem

Pieter 't Hart — Tue, 08 Feb 2011 08:46:23 GMT

I did the same as Tek, replaced the cap's myself.

But beware there are high voltages present in this unit.

Especially keep away of the metal top of the big black capacitor that may carry more than 400V (when testing the kvm-switch with open PSU).

Re: KVM - Power Supply problem

Neal Eckett — Thu, 10 Mar 2011 15:44:41 GMT

I have found a replacement PSU for these boxes. It requires a slight modification to the case, but works a treat :)

Re: KVM - Power Supply problem

Njal_1 — Fri, 01 Apr 2011 18:33:43 GMT

Hi Neal

Do you have a link to the replacement psu?

Re: KVM - Power Supply problem

Nuo Pereira — Tue, 24 May 2011 12:11:02 GMT

I have the same probleÂ´m , i changed capacitor but the same , led is off, you can help-me ?

Re: KVM - Power Supply problem

PDP-Fan — Mon, 10 Oct 2011 07:12:21 GMT

You will have to replace ALL capacitors on that power supply. Especially the small ones can cause trouble, even if they look OK.

Also check the fuse which is soldered on the P.S.... if that is broken, there is more defective as only the caps. Although it is possible that only the fuse alone failed. This happens sometimes.

Re: KVM - Power Supply problem

al3185 — Thu, 23 Mar 2017 21:45:24 GMT

Hey i know it has been years since you posted this but i remember seeing it and decided to come back and let you know and the community know that i found this place in California that can actually fix them and the turn around time is fast, then i sent them the rest of my defective units, i had 15 and in less than a week they were back at my door and for the price is all worth it, they gave me a better deal for the quantity and saved lots of money.

Here is the link to their site:

[Broken link removed on 03-23-2017 by Admin]

they are called OEM Systems and talked to this guy Lius he will help you with this and explain to you better the process and how would be a better way to save you money.

Good luck to you all!

Re: KVM - Power Supply problem

Delltek — Wed, 15 Feb 2017 15:16:32 GMT

PSU Power Supply Repair, Exchange & Recycling Service

HP & DELL KVM
336045-B21 396631-001 340387-00
336044-B21 396630-001 340386-001
396631-001 340387-001
180AS 2160AS KVM RP163 PY252 W7941
DVE DSO-142L Tamura

~~Personal Info Erased~~

Re: KVM - Power Supply problem

lcard — Fri, 22 Nov 2013 13:41:32 GMT

I need know this solution please

Re: KVM - Power Supply problem

henrytrinh — Wed, 15 Feb 2017 15:18:18 GMT

I am experiencing the same issue with multiple devices. Did you ever find a solution?

Re: KVM - Power Supply problem

PDP-Fan — Thu, 14 Jul 2016 11:34:41 GMT

Hello there

As I wrote in my post earlier, you will have to repair or replace the power supply. Most likely the problem are the electrolytic capacitors. If you have experience in soldering you can do that yourself.

If you are in Switzerland or not too far away from it, you could send me the unit for a cost estimate and repair. But keep in mind that such devices can be bought relatively cheap at the hardware broker market.
Or you look for an electronics repair guy near to you....

Re: KVM - Power Supply problem

ken-mchome — Thu, 02 Feb 2017 20:57:12 GMT

Hi i have 3 KVM and the power supply is not working can anyone help me Please, i have a home network and i cannot pay $150. and more to get them repaired

I would appreciate and help.

Thank you Ken

Re: KVM - Power Supply problem

PDP-Fan — Fri, 03 Feb 2017 08:46:21 GMT

http://www.instructables.com/id/Repair-your-electronics-by-replacing-blown-capacit/?ALLSTEPS

This is a good repair instruction. It's not a KVM Switch but the problem may be th same and the way to repair is identical. I would change ALL the capacitors regardless of how they look. Sometimes even the perfect looking ones can be bad. Fortunetely the most expensive ones (rated 200V to 450V) at the primary side of the power supply are in most cases not faulty. Make sure that you also replace the very small ones especially those next to the control chip. The look innocent but sometimes they are the only problem.

Also check the fuse first. Sometimes it's only the fuse...

Many KVM Switches have standard industrial power supplies inside. Look at some electronics distributors for a power supply with the same voltages, currents and size. You may find one that fits exactly. The downside is that these P.S. will cost about $30 to $50 per piece.... saving money can become difficult.

Re: KVM - Power Supply problem

ken-mchome — Sun, 12 Feb 2017 01:59:33 GMT

Ok so i though i could go with a Mean Well Model: RS-15-5 , and it should have all the specs i need , well no they don't work on all 3 KVM , so i looked into getting the caps i need and what should i say , i have looked throw 20 Caps company pages and have only found 1 cap match it is always the size that does not match , would you know where i can get them ? it looks like i need (3) 47uf 25VDC 17mm x26mm , ( 3) 2200uf 10VDC 10mm x 25mm , (9) 470uf 10VDC 6.3mm x 15mm ,

Thank You

Re: KVM - Power Supply problem

ChrisNTL — Fri, 17 Mar 2017 10:10:42 GMT

I have in the past got caps from here...

https://www.digikey.ca/products/en#cat-3

I know they do list dimensions. I have also had luck on ebay for a cap I needed for my daughter's CD player.

Re: KVM - Power Supply problem

ChrisNTL — Fri, 17 Mar 2017 10:20:09 GMT

I just found this listing all specs and parts.

I know it will help me as some caps are hard to read on board when I want to find replacements.

Re: KVM - Power Supply problem

PDP-Fan — Tue, 21 Mar 2017 13:50:57 GMT

It seems someone made a great effort to draw this manual.

One little correction about the capacitor lifetime. A lifetime of 10 000 hours seems not very much. But keep in mind that those 10 000 hours are calculated at a temperature of 105 degree C (or whatewer your cap is rated). If the operating temperature is less than that, the lifetime will be much longer.

In fact a 10 000 hour cap is not too bad at all. The problem is that cheap, noname, crappy caps are used for cheap and crappy power supplies. I suspect this is done deliberately to make them fail shortly after warranty runs out.
I had a Fortinet firewall with a failed P.S. last month. They used 3 good quality NipponChemicon caps and one noname. Guess which one failed...?
Why is an engineer doing that? Why does he choose 3 good ones and one bad one?

I recommend to use 105 deg C capacitors. (Panasonic or NipponChem) The 85C caps will not live very long in such a dense populated power supply. 105C is standard with all PC and server applications. (power sup./mainboard)