power problem HP Pavilion ze4300

[veeran]

Hello I'am hoping that someone could help me with my problem


I opened my notebook to see if I could upgrade CPU (just lifted the Fan and looked at cpu and socket)
When finished with the insepction and had put it all back together. I pushed the power and then the system powers up (all Blue Light indicator-shows and can hear fan go on) for only 1-2 seconds and then shuts down.

I check around and found it could be a number of possible reasons (I found the service Manual)

1) Thermal Pad seal broken - overheats then shuts down (but why so soon?)
2) CPU Fried (thank god for the AMD XP-M models)
3) Motherboard cooked.
4) OR something beyond me

I have never had a problem with it before and I do not believe it's a power
Connection problem. When plugged in the amber light shows (Charging).

Description of system: HP Pavilion ze4300 (xt4345qv)
AMD Athlon XP-M 2000+
512 Ram
If anyone has had the same or could shed some light to this problem
It would be greatly appicated
Thanks Veeran

[bassman]

Hello veeran,
OK, so you lifted the fan. This of course did break the thermal compound seal and it should be replaced appropriatly. Did you lift the CPU out of the socket? If so, are you COMPLETELY SURE seated it exactly as it came out?
If the system is not coming on long enough to produce any real heat, I would lean away from damaged components (not ruling it out completely though). I would double check your thermal pad/compound and replace it with a quality product.
I'm pretty sure AMD requires the OEM pad, but if you are out of warrenty, you might consider Arctic Silver compound ;)

Good luck and hang in there for a bit to see if anyone else has any ideas
Frank :cool:

[veeran]

Hi Bassman

Did the Arctic Silver Compound today,still did not work.

Does the same power up (2 sec) then powers down. All lights indicator's showing.

I'am going to check the CPU and see if it is fried on Monday.
If it is, my understanding is that the chip can be upgrade from 2000+ up to 2800+ (AMD XP-M) is this correct?
And if so would I have to change the BIOS?

Cross my fingers that's it, If not. Then it can only be the board.

Question: Could it be the Ram (drity contacts) and could I use an eraser to them

Thanks agian

[ikenfixit.com]

Try reseating the CPU and make sure the fan assy is mounted square on the CPU.. These have surface mount capacitors on the proscessor and if metal comes in contact with them it will not boot. The Compaq 2100 and twin HP 4k series utilize a foil sandwich type thermal transfer pad and pulling the assy off will not disrupt these. Arctic silver on any area of the CPU besides the riser will result in shorting the CPU out as well. (The stuff is conductive).. Reseating CPU is simple.. Small flat blade screwdriver, Pry the CPU left to release, Then right to lock down. (Small slots right and left on the socket). We repair a ton of these models and they will be high on the fail list. Currently getting 5-8 of these monsters a week.
www.ikenfixit.com

[arrowstrap]

did anyone figure our the solution to this laptop problem? mine does the same thing. it started when the unit was placed in the case and zipped up while it was still on. i replaced the cpu but still have the same problem.

[dsloan05]

I am having the same problem with my HP ze4610us laptop. It started one day when it went to turn it on and after only a couple of seconds, it shuts itself back off. I have tried re-seating the cpu as well as applying new thermal compound but to no avail. It did have a problem booting up all the way a time or two in the previous months before it died completely but like I said it only did that once or twice. But now no matter what it will not stay powered on for more than 1 or 2 seconds. Please help! I'm not sure if the CPU is fried or if it is the motherboard but I don't want to go throw money at these parts if they are not the problem. Where should I go from here and how can I diagnose this problem? Thanks.

[NeWbiE :-)]

i actually had a similar problem with a desktop once. i have never actually seen the inside of a laptop though. for me the solution was power there was some weird short with a power connection and the thing would only run for about 10-20 seconds and shut down. i just disconnected all power cables(internally) which included the PSU (obviously desktops only) but if theres some similar power cables i'd try that actually had the same problem twice :confused:

[dsloan05]

To update, I removed the CPU from mine and tested it in my desktop system and it worked fine. When I powered it back up, since it had not been touched in several months, it stayed on for a little over 15 seconds this time before going back to the 1-2 second shutdown. I am now leaning toward fan/heatsink. I don't hear it coming on at all during that time like it used to, and without a working fan, a cpu can overheat in a matter of seconds which would cause the shutdown. That's my next test. I'll post my results.

[ikenfixit.com]

If the CPU's are testing fine then more likely an FET in the CPU supply line is Kaput.. (Common on the 2100's running the Athlon CPU's).. Worst case scenario? Have seen through-hole trace shorts and most cannot be repaired reasonably. (Systemboard replace for around 309.00 ship included) If this is the problem.. Also NEVER subject a laptop to an enclosed environment condition, Run on a Blanket, Carpet, or similar.. The intake for the CPU coolng fan assy is generally on the bottom and if its covered? Same as placing cardboard over the radiator on your car.. Going to overheat. Good luck all..

[blueman]

dsloan05

I have the same laptop as you and I have the same probelm exactly. Did you get your laptop fixed and how? Can you share...thanks,

[dsloan05]

To further update: I have tested the CPU fan with my bench top power supply and it works fine. Also cleaned everything thoroughly including the contacts on the memory and even swapped memory chips. Battery charges fine and holds a charge, problem is present on AC power also. Still no luck. I'm almost positive the motherboard is the culprit. If anyone has anything else please let me know.