Good evening everyone, I have recovered a Lenovo V520 desktop PC, on which I have mounted an NVDIA GF9500GT 512Mb graphics card (and it is not the only one I have tried) to replace the one originally mounted, namely NVIDIA GT730 (Lenovo code FRU01AJ853), I replaced it because it has 2 Display Port outputs that I cannot use, as I don't have such a monitor or DP/VGA converter. The problem: Windows I can see it, but the Lenovo logo or the BIOS/UEFI, not. So I can't enter the Bios. To view the Boot or the Bios, I have to remove the dedicated graphics card and connect to the integrated graphics (therefore...

Re: asus k53s (motherboard k53sv rev 3)

Thank you Kropotkin for the indications, but unfortunately I have nothing among the disused cards in my possession. Thanks for your time

Re: asus k53s (motherboard k53sv rev 3)

I do not have the possibility to replace it because they are not available in Italy, they only come from the UK and China and with the current situation I am afraid that certain types of imports are blocked. however I did a test, I opened the battery pack and disconnected the positive and negative battery, I powered the PC by inserting only the electronics in the battery compartment; measuring the voltage between + and - where the battery should be connected and the voltage is actually high, there are about 18v. thank you

Re: asus k53s (motherboard k53sv rev 3)

Hi, the original resistor was green. I am interested in knowing a 3 cell 10.8 / 11.1v battery, if the voltage I find is excessive or it should be maximum 12.6V. thanks and how to check the operation without battery .thanks . original battery is A32-K53.

Re: asus k53s (motherboard k53sv rev 3)

hi Kropotkin, what that resistor is for is known; I don't know how it burned. The resistance had infinite value, therefore completely open;

Re: asus k53s (motherboard k53sv rev 3)

NB: Correct: pins 4 and 5 should be DATA and CLOCK

Re: asus k53s (motherboard k53sv rev 3)

the battery connector has 9 pins, starting from the negative side, the first two are the negative, on the next pin (let's call it 3) there are 0v, on the next (4) there are 3.24v, oscillating at 3.27v, on the next ( 5) same situation (these should be given and clocked) the next pins (6 and 7) are 0v, and on the next pins (8 and 9) there is the battery voltage: 12.19 v if it is not charging , Oscillating 14.4v [as I explained before] if it is charging. This situation is with battery connected. If there is no battery, on the connector I have...

Re: asus k53s (motherboard k53sv rev 3)

Hi techtiger, thanks for the prompt reply, then, first of all, the limiting resistor was burnt and I replaced it; without battery pack I have no voltage, with battery pack, the voltage varies from a minimum of 12v to 14.5v and at that point also stops the charge of the pc but the battery does not fully charge. the question I ask myself is this: is it normal for the voltage to rise to that value? shouldn't it be limited to 12.6v? another detail is that the charging indicator goes impulsively, that is, it turns on and off, it does not always...

Hi everyone, I have a question to solve on an asus k53s laptop (motherboard k53sv rev 3), in essence I have about 14.4 v on the battery connector, after about 5 minutes that it is charging (measured with battery inserted). Are 14.4v normal or exaggerated? I state that I opened the PC because it did not charge the battery, I found a burnt resistance of 0.020 ohm that connected with the battery connector and which I assume is part of the charging circuit. The IC of the circuit is the BQ24740. I can't find the PC service manual. Now I wonder how can the correct functioning of the charging circuit...

Re: New Members - please post your introductions here

Ciao, sono Pippostino da Italia. Sono un tecnico elettronico un po' avanti con l'eta' e mi sono sempre occupato in prevalenza di riparazioni di TV-HIFI- SISTEMI di ricezione di ANTENNE. Negli ultimi anni (circa 20) e come autodidatta con i Pc.
Anzitutto grazie per la registrazione al sito; sono qui per imparare qualcosa in piu' e magari anche trovare e avere supporto e nel mio piccolo di dare dove mi e' possibilequalche aiuto.