20 Most Recent Dell Precision T3400 PC Desktop Questions & Answers

what are the indication lights blicking and with which color- amber or blinkking green or solid green

WIndows CD is the most likely method

Seguramente hay un problema con la tarjeta de Video, reemplazala y trata otra vez.

If this desktop can boot to BIOS properly, then you can download the BIOS file from Dell's website, make a bootable media (using other computer) and use this media to update your T3400 BIOS.

you need to scan your pc with an updated antivirus

Test your PSU power supply unit or replace it if your power supply units fan is not working your PSU is faulty http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm Testing and replacing the PC power supply http://www.youtube.com/watch?v=hbNxhvm0czs One bad lead can cause a computer to continue on a cycle of restarting or to shutdown or fail to detect ,boot up a computer hard drive WARNING Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards Test all leads that attach to your hard drive power and data cables IDE ,SATA the leads from your MOTHERBOARD TO YOUR HARD DRIVE make sure they have a secure dust free connections and are not faulty or just replace them they could be faulty Make sure all leads that are attached to your dvd \ cd floppy drives have secure connections and are not faulty or just replace them they could be faulty. Computers need power and data to travel through every working device to continue its cycle and have an end so any faulty leads will end up with a computer error. Even something as small as a faulty electrical or fan lead can cause you problems Motherboard and a Hard Drive any leads between them will fail before your motherboard or your hard drive if its a flat ribbon 40 pin type IDE replace it this will be the first to fail. Check all electrical power input and extensions make sure they are securely seated even the cd/dvd floppy drives need to have current go through make sure these drives are working also check the Cmos battery and computer RAM modules make sure they are securely seated with no dust built up or in the sockets on some motherboards cmos batteries are soldered in. Check you CPU central processing unit make sure its securely seated and has thermal paste it might be getting to hot the thermal paste will help disperse the heat Thermal compound is a sticky paste that is placed directly onto the CPU. http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490 Allowing for a more direct heat transfer between the CPU and HEAT SINK and preventing air gaps from forming between the CPU and heat sink. Another possible reason could be a memory dump you might be running to many programs at the one time putting to much strain on the CPU central processing unit. If you can get your computer stable enough scroll to bottom toolbar bottom of screen right click select task manager applications you will see whats running if you see anything you dont need running select end now also under processes see what is ticking over again if you see something you do not need to be running end now or you might uninstall that program and some unnecessary programs not having enough computer ram can cause memory dumps If you are not sure if a module is right for your system use the Crucial Memory Advisor tool for a list of guaranteed compatible modules. first you will need to select the manufacturer from a drop down list then select your product line from a drop down list then select the model then click find it will take you directly to compatible ram also you will have an option to scan your system you should always for a guarantee on any ram modules when purchasing them or buy working pairs if possible. You might have a virus or malware. Download at least one of these of course it will depend on your operating system. http://www.majorgeeks.com/Microsoft_Security_Essentials_for_Windows_d6242.html microsoft security essentials your operating system must be registered Win7/Vista/XP 64 bit http://majorgeeks.com/downloadget.php?id=4281&file=1&evp=dbb3b0aebe6a6a4ff18089a6489a5e62 anti malware free edition Win XP/2003/Vista/Windows7 http://windows.microsoft.com/en-US/windows/products/security-essentials/product-information malware protection http://100-downloads.com/download.php?p=615 windows xp microsoft security essentials http://100-downloads.com/download.php?p=614 windows 7 microsoft security essentials Capacitors look like small metallic canisters and they are found in many different computer components including computer monitors, computer motherboards, video cards, power supplies and a variety of other consumer products. A bad capacitor can cause a variety of computer problems, but if you can identify the faulty capacitor you may be able to replace it and save your computer. Capacitor Capacitors, sometimes also called condensers, are used to store energy in an electric field. In the context of computing, capacitors are used to block the direct current being circulated around the motherboard. A typical capacitor should last up to 15 years, but some computer manufacturers use substandard capacitors resulting in shorter lifetimes. Computer Problems When a capacitor has gone bad on a computer you may experience a large range of problems. The computer may have trouble booting up, or it may shut down without notice after running for only a short period of time. The most common problems associated with faulty capacitors are that they cause unexpected computer crashes and general reliability issues ranging from read/write issues to distorted screen images. Identifying a Bad Capacitor To identify a bad capacitor you will need to open your computer case and locate the capacitors on your motherboard. A bad capacitor may exhibit swelling at the top or the base of the capacitor or it may sit at an awkward angle with the motherboard, so compare the various capacitors in your computer in terms of size and placement. Additionally, a bad capacitor may have a funny smell or it may have a brownish residue leaking from the top or the base. Prevention Manufacturers claim that capacitors may go bad because a computer is not receiving enough power from a power supply, because of an overclocked processor or because a computer is operating in an environment with too much heat or humidity. However, some capacitors prematurely fail due to faulty work on the part of the manufacturer. If you have a bad capacitor be sure to do research as to the lifespan of other products made by your manufacturer. Identifying bad capacitors http://www.youtube.com/watch?v=ngA4k32jLGc Capacitor replacement http://www.youtube.com/watch?v=s0Pn2tEjY04 How to check a capacitor http://www.youtube.com/watch?v=U4tnHA0phcc Replacing a leaking capacitor http://www.youtube.com/watch?v=s0Pn2tEjY04 Could be a problem with the Hard Drive or the Hard drives PCB http://www.onepcbsolution.com/ http://www.youtube.com/watch?v=du0Qd_3wFWM

Sounds like the memory is bad or not seated properly... take out all ram and then re insert it... 3 beeps can also mean bad video, so try the on board video card or reseat any video cards other then that If you need further help, reach me via phone at https://www.6ya.com/expert/eric_5b00a5ceab1c0cd2

Check your BIOS settings to see if "smart fan" settings are enabled or disabled.

If they are disabled, your fan will run at max speed all the time.

Once enabled, the fan should only speed up as your cpu heats up, and then turn itself down once a lower temperature is reached.

there is no master resest button , if your hardrive is not working it is most likely dead or has a loose wire.

hardrives arent designed to last for ever,what you can try to do is unplug the mains plug leave the pc for an hour or so , and then before pluuging it bavck in press the power switch this should clear all power from the motherboard and power supply.

you can also try reseting the cmos by removing the small battery on the motherboard.
it is most likely you H/d is dead,following benwabnicks advice have you been able to see the H/d in bios. to enter bios press f10 or another key immediatley after powering up the pc, it usually tells you on screen press enter or f10 or another key to enter bios or setup.

let us know how you get on 
Thanks for posting 

just re-install audio setup using provided cd by dell.

remove all the external devices like printer scanner camera or hdd and restart the system or try safemode and run msconfig and disable startup items and try agian

To disable content advisor:-- 1.Go to control panel. 2. Open internet options. 3. Go to content tab. 4. There on the content advisor tab, click disable. 5. Enter your content advisor password.

If it is just your home page it is a simple fix. If you can’t type an address as in www.yahoo.com in the address bar that is different. If you home page is the problem you can go into the tools-options menu and type the correct url in and save it. If you can’t go to any othe page it sounds like spyware or worse. Get good aitvirus and spyware removal programs and run them on your system. Of course that is hard if you can’t surf to any other site. You might have to take it in for service so they can place your hard drive in a clean system and scan it. If you can give more details I will try and give more specific help. Good Luck

You can try the forget password option to gain access and change your password from there.

Power supply needs to be checked.

Check and see if there not in a DPMI mode both on your monitors and the video card under display settings, if your rebooting to get them back on its a DPMI issue that just needs adjustment,

Thanks

Rulds2008 Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

try a different SATA power connection, sometimes they work loose and this issue occurs.

https://www.dell.com/support/kbdoc/en-us/000137253/a-guide-to-identifying-the-source-of-an-abnormal-noise-on-a-dell-pc

this 2007 year PC OLD, has many limits (CORE 2 is one) is this windows 10? 64bit> I bet not its CORE 2 old) I came with VISTA if MS loaded OS, or XP or RedHat Linux? what boot menu are you talking about.? F12? wild guess me, VISTA OS: (now zero support) in windows, we have disk manager, do all devices show up now? this is first, if not here, explorer can not work. lets do the correct order: 1: bios sees my media. (good) 2: then in device manager, it sees them, if not drivers bad. 3: then Diskmanager sees the devices, and must have drive letter or next. if letters missing right click device and add one. 4: explorer (This PC) fails to find it. if above fails sure. easy as 1,2,3,4 order, matters. can't see CD does that mean a disk or the whole drive? cant See HDD, is this HDD0 ,1,2, 3 or? how many HDD do you have, and are there SSD drives there and last what SATA ports are you using, some are limited. here is your DELL.com support page, (12 years later still here) https://www.dell.com/support/home/us/en/04/product-support/product/precision-t7400/drivers what HDD fails, does the PC boot at all? my wild guess NO. what OS what OS do you want to run, that be first thing to ask on any 2007 old PC, as Windows 10 will fail here. I Bet. for sure 64bit.