Mobo bootup issues

Hey all...I just bought the 875P NEO LSR mobo. I had to reinstall XP which is guess isn't abnormal
but...I still get a halt on boot...with the f1 to enter setup or f2 to ignore and boot...which the system will boot up and run fine. I've noticed also that the system time is not being kept or is losing time pretty drastically.
any ideas?? Did my mobo come with a bad cmos battery??
thanks

please supply full hardware spec and system config.

Similar Messages

MSI Z97-G45 Gaming MOBO DIMM issue

So, I have what seems to be a rather common issue I've heard as I continue to research more about the issue, and I'm hoping that it's not my board... but chances are it is my board. My (relevant) specs are as follows:
CPU: Intel I5-4690k
Heatsink: Cool Master Evo Hyper 212
GPU: Radeon HD 6970
Memory: 2 x 4GB DDR3-2133mhz G.Skill Ripjaws X
Storage: Samsung 840 EVO 500gb SSD
So, when I first cracked open my new MOBO box and got a look at this beauty a few days ago I was overjoyed, but quickly became dismayed. At first I thought the pins were bent where the processor mounts, but that isn't the issue here. The issue is that whenever I stick my RAM into the third and fourth socket it literally does not boot up. I can turn it on, the fans go, power turns on and lights flash... except there's no picture on my monitor, the light to my keyboard doesn't boot up, and then it restarts itself before turning back on and resuming... again without any sound, picture, or keyboard use. I stick 1 RAM stick into the third or fourth slot, just one and no others, and it won't boot to the bios or OS, but if it's in the first and second slot then it runs no problem. Except for the first time I received a windows error - my screen went blue and pixelated as I was playing Skyrim for a split second before it rebooted. The error it gave was ProblemEventName: BlueScreen LocaleID:1033...
A quick google search will show that it's listed under a ram issue. So, I was hoping that it was ONLY my ram and decided to switch it out for 2 x 4g 2000 kingston ram from another system in my home. First and second slot no problem, yet if it goes into the third or fourth slot then same as before; no boot to BIOS or OS. I can't believe that two sets of RAM are faulty as I have the kingston's dual channeled in another system that has been running quite well for over two years now. I'm hoping anyone else has had this issue and solved it, because I really, REALLY, don't want to RMA my motherboard, but as far as I can tell I received a defective board and am going to need a new one from MSI. Can anyone help me out or just confirm what I think I already know to be true? Thanks in advance for the help!

Yeah... sadly that's my conclusion as well, but I thought to get a second (and third) opinion just in case my own diagnostics were lacking. Part of me wants to just leave the problem, but I know it won't go away. Looks like I'll be RMA'ing my board - here's to hoping it doesn't take longer than two weeks to get another one back! I was really digging the BIOS interface and the better performance, too :( .

Dv6000 pavillon bootup issue

I have a hp pavillion dv6000 s/n CNF72501HS with windows vista home premium
It takes awhile to bootup
First message I got on bootup
error
0271 check datae and time settings
warning
0251: system cmos checksum bad - default
press <f1> to resume, <f10> to setup
hit f10 fixed the time, went into the diagnostics ran the self-test on the hard
get this message maybe a minute or two test status #1 - 07 Fail
let me know if there is any bad info regarding this model
I am assuming the first issue could be a bad cmos chip
thanks

Dv6000's are well known for all kinds of motherboard issues and failures.
You might consider sending it in for repairs
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=260674058980
Symptoms may include the following:
Weird colored screen (grey, green, red etc..
Scrambled or pixelated screen
Divided split screen (2 screens up to 12 split screens)
Screen black however backlit
Screen black with no backlight however blue lights come on the quickplay panel
Turns on then shuts off immediatly
Turns on and beeps 3 times (1 long and 2 short)
Turns on, black screen and keeps restarting by itself
White or grey screen sometimes with horizontal lines
Press power button and nothing happens what so ever (seems dead) (mostly on DV2000 models)
Intel models boot to backlight but no screen
Cant load Nvidia driver, can only run in VGA mode
Screen works but no WiFi (does not show up in device manager)

Mid '09 MBP bootup issue - flashing folder; possibly a fried drive?

Hi All,
This is my first post here. Today my 14 month old MBP 15-incher froze in the middle of some casual browsing/iTunes listening and decided to not respond to any mouse or keyboard input. I gave it some time to figure itself out and then after about 5 minutes of nothing, decided to force a shutdown by cutting power (10 second power button hold). Then upon my next boot the computer gives the chime, shows the grey screen (no  logo), does nothing for ca. a minute and a half and then presents me with the glorious flashing questionmark-folder-whatever logo. Just great.
I reset the PRAM (option + command + p + r), tried Safe Booting (shift + boot), tried forcing the laptop to boot into the default os x drive/partition (x + boot), tried booting with GUI boot location selector (option + boot) and, when all mentioned practices failed, inserted a retail copy of snow leopard and booted the machine to the ODD.
Disk Utility confirmed my fears: the main HD has no partitions and the "First Aid" tab can't verify or repair the disk.
Help me out here, guys. Is my drive dead (and all my data gone)? Is this a "directory collapse"-style issue? I had one of those babies a month ago on an '07 white MacBook... a new HDD and two hours of data restoration work for $150 at a local Mac-centric repair shop fixed that issue. But this seems a little more serious.
I was two days away from activating a central Time Machine backup to the home-network-attached 2TB HDD, for both Mac laptops in the household. I was also two days away from getting a Crashplan.com family package (yes, I wanted double backup). Why 2 days from now? Because my Carbon Copy Cloned backup HD (a WD elements 1TB) died a week ago. As in, "started-puffing-out-smoke" died.
Perfect timing.
Ideas? Please?
<Edited by Host>

I also suspect your internal HD has crashed. You can run Apple Hardware Test and then Google any error codes however I believe it's probably gone.
Without any backup yes your data is probably gone, there are data recovery services however they are extremely expensive.
If you purchased AppleCare you can take it an AASP for repair however they probably cannot do a thing about your data. If you are not covered by AppleCare of course the expense will be your however look at this as an opportunity to upgrade the internal HD to something with more storage or is faster.
Once you have the new HD installed you will need the original Snow Leopard Install Disks (or possibly your retail copy of SL) to format the new HD and re-install SL and the iLife applications.
Roger
Good luck,
Roger

Mac Pro bootup issues: started with graphical artifacts, and now nothing.

My computer specs:
- Purchased August 2008
- 2x 2.8GHz Quad-Core Xeon
- 2 Apple 1GB RAM sticks
- 2 Kingston 4GB RAM sticks
- NVIDIA GeForce 8800GT 512MB
-== The Saga of Trouble, Episode 1: Into the Very Heart of Trouble ==-
Started World of WarCraft. Trying to get rare Green Proto-Drake mount. Suddenly, approx. 3 minutes after starting the game, the display goes haywire: artifacts, flickering, you name it.
Tried:
- Power-cycling display: image returned, still messed up.
- Command-Q: nothing, no response.
- Yelling at computer: nothing, no response.
- Holding in power button to shut down: system shut down.
- Rebooting: no REFit bootup (I have REFit installed), and the gray Apple logo has graphical artifacts. Eventually I'm brought to a screen that looks like something out of an NES where the cartridge hasn't been cleaned.
- Rebooting with a different monitor: same result.
-== The Saga of Trouble, Chapter 2: Love is the Key, But Only When Contextually Relevant ==-
Cursing several times, and promising the Mac Pro swift physical retribution should it refuse to work, as, in my hubris, I haven't made a Time Machine backup in a while, I unhooked all cables from the tower, set it on an appropriate work surface, and opened it.
Tried:
- Dusting the interior with compressed air: dusted without incident.
- Checking to ensure graphics card was well-seated: it was.
- Checking to ensure RAM sticks were well-seated: they were.
- Complimenting self on proper usage of past tense: false sense of satisfaction given my Mac Pro's trouble.
-== The Saga of Trouble, Third Strike: Startup on Low Forward Reduced by Two Frames ==-
Reconnected everything and attempted to boot. A fan that normally whirs on startup (I assume from the graphics card, but I didn't visually confirm in the past) is not whirring. The characteristic "Apple noise" is heard, but nothing on screen.
Tried:
- The other DVI port on the graphics card: no dice.
- Another monitor: nothing.
- Another monitor on the other DVI port on the graphics card: no luck.
-== The Saga of Trouble, Future Shock: Escaping the Saga of Trouble ==-
With two upcoming trips, all part of chasing my dreams to become an awesomely famous screenwriter and game designer, instead of just an aspiring wannabe, I cannot afford to do what I think will solve the problem, and that's purchasing a new graphics card.
Given my foolishness in not making regular Time Machine backups, reinstalling the OS is going to be a last resort. As in I'm not trying that until I've exhausted all other options (which, as taught in college and in the four years of my life I wasted as an IT guy for an ISP, is not what you should try first anyway). I'll exorcise the HDD and plug it into something else before I reinstall the OS.
Given the above two points: what's my next step? Is there something I can try before either purchasing a new graphics card or reinstalling the OS?
Many thanks in advance for any advice.

Apple firmware (or flashed card).
The ATI line of Apple cards use universal EFI (EBC) so even the new 5770/5870s work as well.
Check the test results coming out on
http://www.barefeats.com comparing cards.
I realize the hard restart may be 'necessary' but booting from DVD or running the single user mode command FSCK -fy can minimize directory repair problem if you don't have OS X on another drive.
Installing OS X is fast and easy if you can shrink 30GB off another drive that you would then be able to boot from and has just mini OS and utilities.
Cache files often are the first to become corrupt as well, or prefs, anything that was in memory and that are changed frequently and after a startup. Cache files are automatically rebuilt and no fear if you can delete those.
AppleJack and Snow Leopard Cache Cleaner can 'enhance' what diskutil fsck you can do and add some more commands.
8800GTs are harder to find, still on ebay at times.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300448795337

PowerMac G5 Dual 2.0 GHz Bootup issues

So, although I have much knowledge about Windows and a decent amount of knowledge about Linux Operating Systems, I know little to nothing about Mac OS X. My knowledge of iOS 8.1.2 is very good, but switching to Apple as my main provider of computer and phone systems and parts has been frustrating. I have 3 PowerMac G5's, each the dual 2.0 GHz models that I recieved as a housewarming gift to the Apple community. However, when I start up the computer, I get a flashing symbol with the "Finder" application logo, then a square with a "?" In it, then back and forth with a second between each flash. I've tried holding the option key with and turning it on (with no CD, with a copy of OSX mountain lion on a disc in the drive, and with a copy of Ubuntu 14.04.1 LTS burned to a disc in the drive). I have tried installing the Mac OSX Mountain Lion to the hard drive on a separate computer, then booting it using the PowerMac, but to no avail. Can anyone help me with this issue? I've fallen for Apple and won't revert back to windows, but don't want to buy a whole new Apple computer.

Tiger Requirements...
To use Mac OS X 10.4 Tiger, your Macintosh needs:
    * A PowerPC G3, G4, or G5 processor
    * Built-in FireWire
    * At least 256 MB of RAM (I recommend 1GB minimum)
    * DVD drive (DVD-ROM), Combo (CD-RW/DVD-ROM) or SuperDrive (DVD-R) for installation
    * At least 3 GB of free disk space; 4 GB if you install the XCode 2 Developer Tools (I recommend 20GB minimum)
http://support.apple.com/kb/HT1514
Apple may even have an International version, but reports are sporadic...
https://discussions.apple.com/thread/5231053?tstart=0
http://www.ebay.com/sch/i.html?_nkw=mac+os+x+tiger+retail+10.4
See Tom's, (Texas Mac Man), great info on where/how to find/get Tiger...
https://discussions.apple.com/message/15305521#15305521
Or Ali Brown's great info on where/how to find/get Tiger...
http://discussions.apple.com/thread.jspa?messageID=10381710#10381710
Leopard requirements/10.5.x...
    * Mac computer with an Intel, PowerPC G5, or PowerPC G4 (867MHz or faster) processor
minimum system requirements
    * 512MB of memory (I say 1.5GB for PPC at least, 2-3GB minimum for IntelMacs)
    * DVD drive for installation
    * 9GB of available disk space (I say 30GB at least)
Classic/OS9 Apps no longer supported.
May be available from Apple again, or not...
https://discussions.apple.com/thread/4720126?tstart=0
Trouble is Apple no longer sells it, check eBay & such for the Retail version, not the Gray Discs...
http://www.ebay.com/sch/i.html?_nkw=mac+os+x+leopard+retail+10.5
List of Applications Not Compatible with Leopard...
http://guides.macrumors.com/List:Applications_Not_Compatible_with_Leopard

Hey all, new here, some bootup issues.

I am running Windows 7 with 2 hard drives, one is just an extra one that I use to store pictures on, and one is my main. Neither are SSD. I installed Ubuntu alongside my 7, then later I deleted the partition with Ubuntu on it and want to just use Windows 7 again. I went through with my install disc and repaired my bootloader, and it works, but now it is hanging on 99 for about 3 or 4 minutes before it finally goes on through to A2 where it boots no problem at all. I have not been able to get into the BIOS. How can I circumvent this 99 and get it to boot in about 10 seconds again instead of 10 minutes? Thanks in advance.
Z77A-G43 with I3-2120.

Quote
do you need to remove the on-board jumpers to overclock if you are trying to achieve over 1600 Mhz FSB? I currently have the jumpers off.
Removing the jumpers will set the FSB Frequency to 400 MHz and force the system into a default-400 MHz Strap. You should also be able to overclock manually in BIOS starting from other jumper position. Just test and see which one works best for you. It may be the default position or the 400 MHz position (jumper removal).
Quote
2. I've notice that the GTLREF voltage is not within 63% of the CPU VTT using the latest beta bios A7512IMS.153 [v1.5b3]. Is that right?
How did you notice that? What percentage does the BIOS set in your case?
Quote
3. Anyone have any experience using the RAM modules I have? See sig for details.
That is more or less standard DDR2-800 memory which should not make any problems. In terms of overclocking it, you have to see what can be achieved. Memory OC Results usually vary from system to system.
Quote
4. Green Power Center crashes in Vista when making changes. Is there a unknown compatibility issue? I've have installed fresh copy of Vista.
Are you using the latest version?

P67A-G45 (B3) Bootup Issues

I'm stuck at a black screen with a 98 at the bottom-right of the screen and a repetition of beeps. This motherboard has been working perfectly for the past half year and the problems have just started to occur after I dusted out my computer last week. I ended up spending 4 days cleaning out my computer since I've had a busy week and I went at it slowly. I'm pretty sure everything is put back in correctly since there actually is an output on my screen but I have no clue why my computer's hanging on startup. Any inputs anyone?
Specs:
Mobo: P67a-G45 (B3) in case you missed the topic title
CPU: i7 2600
RAM: CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ8GX3M2A1600C9
G.SKILL Value Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-8GBNT
GPU: SAPPHIRE Radeon HD 6850
PSU: Kingwin 1000W
2 TB Seagate Green Drive
I don't do any overclocking or changes on the bios.

Quote
RAM: CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ8GX3M2A1600C9
G.SKILL Value Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-8GBNT
Recommend to remove one or the other. Recipe for failure mixing kits often even from the same manufacturer and part numbers. Why it worked for half a year? Who knows. Best off if 16GB is required, to purchase a matched kit. If I was going to take a chance on another kit to try and match up, it would be the Corsair.

Recurring bootup issues on Macbook Pro

I have a 2012 Macbook Pro running OS X (10.7.5) The last two mornings it has failed to boot. I managed to boot it into recovery mode both times and run a disk repair. After that, it booted up fine, both times.
However, it concerns me that this is a recurring problem. If the disk repair had actually fixed the problem, would it have recurred?
I'm wondering what my next step is. I have a recent backup, so do I erase and restore from the backup?
Do I take my machine in to get a new drive? Do I reset the NVRAM? Do I replace the NVRAM?
Any help is greatly appreciated.

Try resetting the SMC. If that does not help, I would take it in for diagnosis. As you are aware, intermittent problems are difficult to diagnose. To suggest a fix remotely would be a sheer guess.
Barry

IMac bootup issues and spinning beach ball of death.

Hello Hello.
So I was recently given a brand new iMac 27inch by Apple, due to the death of my 2008 24inch iMac. Everything has been going great with it until today. I restarted it at some point this afternoon, and ever since then it has been acting quite strange. First thing i've noticed is that when I boot it up, when it gets to the white screen with the gray apple logo and the spinning thing, there is now a transparent rounded rectangle bar at the bottom of the screen for a minute or so...which was never the case before. Then, if it decides to proceed to OSX (sometimes it wont), the beach ball of death never stops spinning, which of course means i can do pretty much nothing. On top of that, it will not connect to the internet...my Macbook Pro connects fine to the wifi, so I know it's not my service. Bottom line, I have no idea what is going on. I've had it only for a couple of months, and haven't really had any problems until now. I'm hoping I'll just wake up in the morning and everything will be back to normal...
Any ideas?
Thanks for yer time
IAN

I was able to get 'places' working on my Mac Pro by opening a library I created on my Macbook Pro (no crashing experienced in that install from the start) that contained a single geotagged image. The function works fine even after deleting the image, it just seemed to need the location data to get it kicking. I was creating a new library (since started as a trial) and was not upgrading an version 2 library.
There is obviously a bug here that needs addressing though.

HELP Firmware / Bootup issues Zen X

i've had my Zen Xtra for about 6 months its a great product and works well until now... lately it constantly freezes at EAX screen, yesterday i tried hooking up my player and it said it wasnt connected... then i tried updating firmware w/ the Software Autoupdate, and it would not detect it so i manually downloaded the firmware, and it updated and my player worked, so while i was at the site i decided to do other updates that were recomended which is where my probs. start it does the first update and now my player is stuck at rescue mode and now my PC does not at all read or recognize the playerMessage Edited by Milhouse on 0-9-2005 06:22 PMMessage Edited by Milhouse on 0-9-2005 06:29 PM

Same problem some of us are experiencing with the Zen Touch. See my post titled "Boots up into Recovery Menu". It appears to be a hard dri've error (at least that's what it shows on the LCD).

Bootup issue

Im using a nforce K7N2 mb and have downloaded all the latest drivers. When I turn on my machine the hard drive makes some clicking noises which will last for about 45 seconds, then it will stop and the computer boots up fine. I was wondering if this is a serious problem as my system seems to run just fine. Any ideas?
Hunter

Hunter,
That is the twitching of death for your Hard Drive. It is getting ready to go. You can try running a full scandisk and have it fix all errors. If you still have the clicking then RMA the drive.
Sorry,
Richard

CPU Issue?

Hey guys, I'm looking for some advice with my setup.
I've got the K8Neo2 Platinum nVidia nForce3 ATX MOBO with an AMD Athlon 64 3500+ 2.2GHz processor.
My issue is with the score im getting from 3DMark05, and yes i've posted there, and they said it was a MOBO/Processor issue.
I'm getting a VERY low CPU score, and less than 1FPS with the CPU tests.
Here is a link to my specs/score. http://service.futuremark.com/compare?3dm05=1188506
Just post up any more information that you'd need to know to be able to help me out.
Any help with this is appreciated greatly. Feel free to IM me on Waimzey.

Good job upgrading your nForce chipset drivers as well as your processor drivers to the latest versions.
Your input: "I had 24 processes running and zero applications other than the benchamrk when i ran the 3DMark05 this time, Still had no change in the score." Did you get rid of anti-virus completely or was it still just disabled in your systray?
Your input: Also, As far as my memory goes. On the POST screen it pops up this information,
DDR 200 Single Channel: 64bit Mem Clock is 100 (just below this line you should see your memory timings, what are they?)
These numbers are troublesome but more DATA require to analyse. Please yield to my request and go to this forum user profile and take time to build a detail sig block containing your system details. Use other members signature blocks as benchmark. We truly need this to help you. All I can GUESS for now is that if you have two 512 memory sticks running in your computer they are only running in singlle channel and you DDR and Mem clock are cut by half. If this is the case it need to be rectified.
Your statement: And then in my DRam config, under the Cell Menu in the BIOS..
Max Memclock - Auto (should be 200 MHz)
1T/2T Memory Timing - 1T (this is OK)
Then the other 4 options (Cas# latency, Ras#, etc) They are all set to Auto (manually set by you)
Overall, this is interesting info - Auto settings may not be doing the job for you but I cannot say conclusively until I know what your 1024 memory package is made off and into what memory slots you have inserted them into (should be first two from CPU, one Green and one purple). Furthermore you should set all memory options manually to what is required by you an OEM, so research your memory timings and voltage.
CPU set up in BIOS should also be done manuallly to accurately reflect AMD specs for your CPU and you MS-7025 motherboard:
HT frequency : 5T
I will be assuming you have an AMD A64 Athlon 3500+ for below settings)
Adjust CPU Ratio: 11
Adjust CPU Frequency: 200
CPU Voltage/Vcore: Manually set your CPU voltage value as per OEM
Memory voltage: Manual value as per OEM
Looking forward to getting more info from you, good luck

MSI Z77 MPOWER USB ports issue

Hi Y'all,
I have a problem with the USB ports on my mobo (or so I think) and I hope you guys can help. Hope this is not a double topic/thread either.
A few weeks back, I slightly took apart my system to swap out the PSU, install more fans into the case for some push-pull configs and more air cooling as I intended to OC my graphics card (I also reapplied the thermal paste on the chip) . After I put everything back together and rebooted, some USB devices (webcam, Corsair keyboard, mouse etc.) needed to be switched around to different ports to be able to work. After that everything seemed to work fine again. However, last week, when I tried to connect a Satawire cable to the front I/O panel USB port, the system takes a while to recognize the device. One recognized and trying to install drivers for the Satawire cable, the system failed to find drivers. Samething happened when I tried to plug in my HTC phone or PS3 controller (failed to install drivers). I have a couple of ports on the back (mobo I/O) vacant, tried plugging these things in, same result. Weird thing is my flash drive worked fine when I plugged it in (I haven't dared tried to unplug my webcam, or keyboard, or mouse yet).
I tried plugging the Satawire cable to my laptop, my laptop recognized and installed driver automatically. I have tried Clearing CMOS, reinstalling Intel Management Engine Driver and Intel Chipset Driver for the mobo (as some people suggested I try) but to no avail. I have also tried switching the USB cables (leading to the front IO panel of the case) to different ports (3 in total) on my Mpower mobo but to no avail as well. I really don't know if this is a Mobo/BIOS issue or an OS issue. I want reinstalling Windows as my last resort.
Please help if you can. If you need more information please let me know.
Thanks all.

Quote from: JLio01 on 04-September-14, 18:15:04
just disable the USB 3.0 function and make them become USB 2.0...I'm not sure if there might be any changes on power supply. Maybe you could try.
I'm confused. I doubt disabling USB 3.0 Controller would help. The front IO panel has 5 USB ports (four 2.0 and one 3.0). I have my flash drive in the 3.0 port almost 24/7. I even tried sticking the flash drive into the 2.0 ports, my system still recognizes it as storage (albeit giving me a message that I would get much faster speed from the USB 3.0 port). I have most of my current devices connected to USB 3.0 ports in the back IO panel and everything is still working.
I have tried resetting Generic USB Hub as some people suggested online, but to no avail.
FYI, I tried booting my computer into safe mode to see if the problem persists and it does. But I notice in safe mode, my computer recognizes the SATAwire cable or the PS3 controller (via USB) almost instantly and failling to install drivers (after searching preconfigured driver folders) almost instantly as well, not like in regular mode, where it could easily take 10-15 seconds up to 30 seconds for the whole process. So is it safe to conclude that it's not an OS issue, meaning if I re-install Windows and start with a fresh driver folder, these issues would still happen?

Caps Lock/Num Lock LED blinks 5 times on bootup - HP ProBook 6450b

Hi all members/pros, I was tasked to resolve a bootup issue on a HP ProBook 6450b and did managed to get it up and running again without much effort. The notebook Caps Lock/Num Lock LED flashes/blinks 5 times and then pauses and blinks again 5 times. Seeked assistance on online HP support(link below) and it stated that it was a System board failure. http://support.hp.com/us-en/document/c01732674 So then I opted to swap the hard disk tand LCD monitor hardware with with another HP ProBook 6450b which is functional but display damaged as the user was a senior manager at where I worked - Boroko Motors, Papua New Guinea - and prolong downtime was not an option. Just as I was about to get under the hood, the buggered notebook deciided to spring back to live loading onto the Windows login screen. I noiced also that I was in our server room(with much cooler temperature) that may have aided the componenets on the main borad to function so I presumed the cooling system was at fault. I then got under the hood and confirmed that the fan/vents were clogged up with dust/debris which might have collected over time. Did the cleaning and after that it hasnt failed so far... Thanks all! Get the HP ProBook 6450b service manual here: http://h10032.www1.hp.com/ctg/Manual/c02760808.pdf

I, recently, bought a 6735b hp laptop for $100. It does the same thing as your describe. I think the motherboard overheated. So, I ordered a new motherboard from getcomputerparts.com out of China to see if it will solve the no boot problem. I'm hoping this will solve the problem. I noticed that when I first got the laptop, second hand, that the fan wasn't blowing out, and later found a lot of dust that simply blowing it out solved the air circulation problem. I think that the heat destroyed some connections to the video or hard disk drive controller chip which made my hdd light blink on and off every second or so, and also made my Optical Drive seem to blink its LED on and off, and a slight scratching sound every second, as well.
I also, saw on Youtube.com, a video about the nvidia video chip getting connection heat damage at the solder joints, and there was a way of putting a penny with heat sink paste after 'burning' it for a couple of hours with a hot spotlight lamp with aluminum foil around the rest of the board to protect the rest of the board other than the video chip. But, this was on another hp product that failed after 1 year, no screen no POST.
I am hoping a 'new' system board will do the trick though, and I am spending about $153 for the part delivered, and $75 to put it in at a local computer shop.
part url:
http://www.getcomputerparts.com/hp-compaq-6535b-6735b-series-laptop-motherboard-system-board48819400...
Wish me luck!
-Duane

Mobo bootup issues

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