Federick

Hey there, I have a simple question for you. My 2011 hp Probook 4520s is 'starting' to show the weight of the years. I use it for university only, so mostly as a browser, for viewing pdf (heavy ones too) and sometimes I run Magic the gathering Arena (=P). Since I am very attached to this laptop and since I don't need a big amount of calculating Power, I am thinking about upgrading it by installing more RAM and an SSD. Now It Mounts: Windows 7 Professional 64bit CPU Intel Core i5 480M @ 2.67GHz Arrandale 32nm RAM HDD My simple questions are: 1) I can't find anywhere the exact model of RAM to put in- There are a couple of threads on the hp support site, but no one really answers the question The only info I found was on ebay, where i saw auctions for ram for hp probook 4520s (can I trust them?). So, what Ram should I buy? 2) Which SSD should I Buy --> Is there any bottleneck that an old pc gives to new SSD? 3)In this moment I occupy more or less 200 GB, of the total HDD: What size should I buy it? I wouldn't like to spend too much money, I'm not yet decided between 240/250 and 480/500GB. What do you suggest me? Thanks in advance to those who will help, Greetings Federick

To answer those who asked and for readers' sake, The problem was the very first thing we excluded because so unprobable: the second PSU was broken too! Of course the first one had fried the mobo and the VGA. Good luck if you are stuck in my same problem. Thanks to all who helped!

Oh gosh! So maybe also the GTX got fried?!? yes I tried. Still no POST. Thanks for the advise. I will keep you uptaded

This is what I was Thinking too! I agree for the mobo. Of course I cannot RMA the case since there are burnt or cut cables, can I? Directly to the mobo through VGA. Indeed i also tried to connect the GPU and connect the monitor via HDMI, but also in this case no signal arrived qto the monitor.

Thanks everyone for the answer. I didn't attach the photo of the burnt cables because i cut them off somewhere before point where the plastic melted. In this way i hoped to solve the problem because maybe the problem was a second shortcircuit in these cables. I want to underline that the "only" burnt cables where those coming from the case, namely the SATA connector for the PSU, and the fans' cables. All these cables come from the front panel of the case (that i inspected without finding any macroscopic damage). I Also tried to boot the mobo on its box, but I didn't manage to power it up with a screwdriver as seen in some Yt video. Maybe it was mobo's fault, or more probably it was mine. In any case, the only thing i connected from the mobo to the case was the power on button. Also running the mobo on its box (with only CPU, PSU and 1 RAM) there was no POST. i don't know if the experiment can be considered valid since that I connected the power on button of the case as said. In the meanwhile, thinking the PSU was the guilty guy, I returned the cx450m to have a new one back. But also in this case, with a New PSU still no post. Can i do that? Couldn't the OEM say that i assembled badly the computer and so that it was my fault? I excluded as a cause of the problem: - the PSU - the case (Q: can we consider the test negative even if the power on buttonnwas still connected to the mobo?) So remains the mobo.. Do you agree?

Hi there, I'm italian and this is my first time writing here in Ltt. I read the thread "README: How to respond to a no POST or no power up situation" and used the search function but I didn't find anyone with my exact problem. I have assembled my pc with these specs: Asrock AB350M Pro4 Amd Ryzen 3 1200 Zotac GTX 1060 AMP! Crucial 2x4gb (DDR4) Corsair CX450M Western Digital Blue 1tb Case: Corsair Spec-Alpha Carbide Series This case has two front fans and a rear fan. The rear fan has been connected directly to the mobo using the apposite pins. The front fans are connected to the front panel of the case (where there is a switch to regulate the fans' speed) and finally a SATA cable connects the front panel to the PSU. This was important because this is the part that went on fire. After everything was assembled, i turned the computer on and the risult was: - Every fan moving (comprehensive of CPU and PSU) - ‎the fans' switch was working properly - but ‎no signal to the monitor (not even the BIOS) After forcing the shut down and restarting, the computer started rebooting every 30 sec. Still no signal to the monitor. After forcing the shut down and restarting again, the computer was always turned on without giving any signal to the monitor (but without rebooting). Every forced shut down could alternately switch the computer's behaviour. After some minutes while the computer was shut down but the PSU was powered on, I felt like something was wrong because i was sniffing that something was burning. Thinking that it was just my imagination, I switched on the computer. At that point the cables of the front fans started melting, and the SATA cable alimenting the front panel got on fire. Immediately I plugged off the PSU and detached any front panel cable from the fans. At this point I switched on again the computer and... Magic! The BIOS appeared on screen and everything worked. I rebooted with the USB pen drive inserted in for installing windows, and also in this case everything went well. I kept the computer on for several minutes to understand if there was something melting again and tried also to reboot it a couple of times and still everything worked. So I was sure that the problem was this connection between the front fans and the front panel of the case. I switched off the PSU to move the computer from where I assembled it to where I would place it everyday. But again, when i've plugged in and switched on the pc, no signal has arrived to the monitor. Again if i force to shut down it begins looping. The same as before but the fact that nothing seems to be melting. I followed some guides in the internet and tried these: - changing the monitor (seems stupid, but evrntually i tried) - ‎restarting the CMOS - ‎reseating everything - ‎tried to power up eliminating one component at the time, till switching on with only CPU and mobo. Still no signal on screen. - ‎cut off the melted cables in order to avoid further short circuits. What do you suggest? Grateful for your cooperation, Greetings Federico