Ps2 fuses I am strugeling with a ps2 that is dead.I tested the ac adaptor and even tried another one and no power.So i know it's not the adaptor.I opened it up and there was no loose wires that i could see. i think its a fusebut i dont know where they might be located. Could someone help me to find the problem or help me with a repair guide or service manual?

Hi,

It is unfortunate that the computer is not turning on. Request you to try following the below steps which might help:

(1)Turn off the computer.
(2)Remove all the external peripherals like AC Adaptor, flash drives, battery, etc.
(3)Press and hold the power button for 30sec which releases the static on the computer (if any)
(4)Put back the battery and plug in the AC Adaptor.
(5)Let the computer charge for some time.
(6)Try turning on the computer.
If the computer doesn't turn on then check hoe the Power LEDs on the system, battery and AC Adaptor react. Then I can check and help you further.

Thanks and Regards.
Kiran Kumar.
#iworkfordell.

First you you should test the AC power adaptor properly, then if it is in good conditions is important to test the electric circuit in the motherboard in order to find any trouble. There is a SMD fuse between de DC power jack and the rest of the circuit.

Firstly check that there is power to the Ac adaptor, this can be done by seeing if the green power indicator light is on on the adaptor body.

If not, then you have a defective plug, blown 3 amp fuse or the adaptor is fried (not uncommon)
If you have a multimeter, you can set it to 20 volts DC and with the adaptor pligged into the mains, test the DC JACK end! by putting the red probe to the inner part of the jack and the black to the outer part, if no reading, then assume the adaptor is dead.

Best way to check is by testing with an adaptor (universal charger type) to see if that works.

Assuming the adaptor is putting out power, check the output with a multimeter as above and see if the voltage is at the correct level (think its 19 volts on that model). If it is, then move on to the DC jack connection on the netbook

Watch the power indicator on the adaptor, if it is not steady green (ie flashes on and off), ther power is not making a circuit in the alptop and is being "spat back", this can be anything from a blown circuit board in the power circuit, to something as simple as a motherboard main fuse.

If there is a staedy green light but no power at the netbook and the jack connection at the netbook is firm and not sloppy or loose, then you will need to have the netbook dismantled and the fuse checked ( this will also need to happen if the jack connection is loose.

Sometimes, removing the battery, pressing the power button on (with the adapator unplugged) for 30 seconds and repowering with the ac adaptor can reboot the system, but I'd be inclined to suspect the adaptor first

remove ur battery change ur adapter
if not work there is short inside ur laptop
it is recomended to consult ur technician

Hi,
Yes, it should run off AC power even if the battery is removed. Sounds like either the motherboard or your AC adaptor might be failing. I would start by trying the AC adaptor with another dell to verify it it's not dead.

Good luck,
Raf

Take out the battery and then try the different ac adaptors. If you still get no lights on the laptop then the motherboard is bad and would need to be replaced. Just make sure that you know at least one of your ac adaptors are good.

If the adaptors have lights and they turn on then you know the ac adaptor your working with is good. Also make sure they are plugged into a good working outlet.

"When the charger is connected to an AC source, the green LED shines steady and bright."

are you talking about the led on the AC-adaptor? cause if its that led that dims down, its a defective ac-adapter (even tho you still might not believe me). replace it and try again.

how would you know that the battery is fully charged?


please rate my solution after you have tested if it works out for you :)

prob. wet on inside, use hair dryer, good luck!!!

so is the KVM (control side, PS2 mouse / kbd>??)
or are all PS2 ports wired to adaptors,? i cant guess this nor what was used before, no history stated.
what was there before, this act?
and what now?
Ill assume worse cases (tossed a coin)
18 (16+2) adapters now. all devices are USB but KVM
ok.?


what mode fails, both the KVM pushbotton switch and or the hot key commands on the kbd?
Oops no manual button as seen on modern KVM.

KVMs are very complex. the hard part is the vast number of different PC.
USB , PS2, VGA, DVI and HDMI.. yah,..
OK 16 +2=18 x ps2, and 9 VGA ports. it is.
NO KVM does it all, ,, old KVM' do NOT work , on new computers, all folks know this , if they tried. or took readings to learn why it fails.
I bet power to the KVM is dead., no LED./
no manual button ,oops.
pin 4 PS2 reads 5vdc and connected up, same?
we use breakout boxes (DIY) to test ports connected.'

that Compaq is very old and no support now, no books.
why not ask at real HP, maybe some old guy there can dig it lost books>
40 KVM? that what you said, really? (or 40/8=5 kvm)?
my guess is the adaptor does not work or power issues
KVM >>PS2>>>ADapt>>> USB.(server) (usb 1,2,or 3 at server?)
The KVM in most cases, here, steals power from PS2 ports but not this KVM , its better.
i'd bet that adaptor cant do that.
(is the caps lock key working on the KBD and laser LED glowing on said mouse?

ask here, real HP.
lets see tests:
1: pin 4 ps2 5vdc?
2: mouse glows?
3: keyboard led , caps lock toggles? (glows)
4: lost the hot key commands (y/n)

one other problem is the BIOS in the server may not like your adaptor at all. When BIOS scans the keyboard. it expects a ID response if missing or grabled, it drops that device port.


https://h30434.www3.hp.com/


btw, one way to cure this, is run headless server software
end KVM for ever.

i run a LAMP server, that comes in the box, no kvm no any thing on ports. it has a web page to go to and do service that way.
port IP+:12321
modern ways work best.
in a server farm, a keyboard/mouse/monitor on rolling cart
for the super sick servers is best...

the other problem is USB only PC or server
does not scan PS2 ports, it has none
so if the adaption fails, at boot time, all is lost.
(BIOS reports connected devices to the OS)(unstated by you)so if the report fails, problems happen
for sure after the boot.

this device is s business device, now ("Enterprise)
the posts on it are like 10 years ago. all links to books now dead.
infact the compaq server that had them is turned off. (grin)
here is my search there. Why not ask them?




https://www.hpe.com/us/en/search-results.html?client=&qt=kvm+4110&search=%EF%98%90&cc=us&charset=utf-8&hpa=http%3A%2F%2Fwww8.hp.com%2Fus%2Fen%2Fhpe%2Fcontact%2Fcontact.html&hpn=Home&hpr=http%3A%2F%2Fh41131.www4.hp.com%2Fus%2Fen&hps=Home&lang=en&qp=url%3Ah41131.www4.hp.com%2Fus%2Fen+url%3ANEW+URL+GOES+HERE

Could it be a fuse inside the ps2 that has blown? Take it apart and see if any wires have come off somewhere, power is gettign to it so there must be a in-line fuse somewhere or a loose wire, or maybe a dry solder joint.